{ "data": { "a": { "slug": "murf-tts", "name": "Murf TTS API + MCP", "vendor": "Murf", "vendorUrl": "https://murf.ai", "kind": "model", "category": "text-to-speech", "summary": "Murf's API for generating speech from text.", "url": "https://www.anchorterminal.com/tools/murf-tts", "markdownUrl": "https://www.anchorterminal.com/tools/murf-tts.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/murf-tts.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/murf-tts.json", "dns": "murf-tts.grade.anchorterminal.com", "repo": "https://github.com/murf-ai/murf-python-sdk", "license": "MIT (SDK and MCP server)", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.murf.ai/v1", "packages": [ { "registry": "pypi", "name": "murf" }, { "registry": "pypi", "name": "murf-mcp" } ], "auth": "api-key", "authNotes": "`api-key` header. A generate-token endpoint issues short-lived tokens (sent as `token`) for client-side use. The MCP server reads `MURF_API_KEY`. Streaming runs on regional hosts such as `global.api.murf.ai`, non-streaming on `api.murf.ai`.", "pricing": "freemium", "pricingNotes": "Free trial of 100,000 characters with no time limit. Pay as you go with a $2 minimum purchase. Falcon 2 is 1 cent per 1,000 characters (marketed as 1 cent a minute), Gen2 $0.03 per 1,000 characters. Enterprise contracts add volume discounts, reserved concurrency and data residency. Startups under 100 staff can apply for 50M free characters over 3 months (https://murf.ai/pricing?product=api).", "priceSummary": "Freemium", "where": "both", "x402": { "level": "no", "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 108, "npmWeekly": null, "pypiWeekly": 669, "asOf": "2026-09-30" }, "docsUrl": "https://murf.ai/api/docs/introduction/overview", "llmsTxt": "https://murf.ai/api/docs/llms.txt", "openapi": "https://murf.ai/api/docs/openapi.json", "capabilities": [ "speech.tts", "speech.streaming", "speech.voices", "speech.languages" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "python", "openapi", "llms-txt", "mcp", "streaming", "enterprise" ], "lastRelease": "2026-08-20", "graded": true, "anchor": { "graded": true, "score": 69.5, "grade": "B", "agentReady": false, "rank": 240, "ranked": true, "rankOf": 1510, "categoryRank": 7, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 71, "maintenance": 73, "payments": 40, "reliability": 90, "schema": 85, "security": 68, "transparency": 67 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": -3, "negativeNotes": [ "2026-10-19, -3. Murf's changelog announced Falcon 2.1 and said the identifiers `falcon-2`, `falcon2` and `FALCON` \"keep working and now use Falcon 2.1\", so callers pinned to the generally available Falcon 2 got a different model from the day it was announced, with no earlier notice found. The vendor says no code changes are needed, and on 27 October it noted each model has its own voice catalogue. The floor, as deepseek-api took for routing `deepseek-v4-flash` to V4.1 Flash the same day (https://murf.ai/api/docs/changelog/2026/10/19)." ], "verdict": "Falcon 2.1 costs 1 cent per 1,000 characters on pay as you go, with a $2 minimum purchase. Concurrency is 2 outside US-East on free and pay as you go, 5 on US-East, and on 19 October 2026 the `falcon-2` identifier switched to Falcon 2.1 on the day it was announced.", "bestFor": "Budget voice-agent output where 2 to 5 concurrent streams are enough, or for studio-style renders on Gen2.", "strengths": [ "Falcon 2.1 costs 1 cent per 1,000 characters on pay as you go, with a $2 minimum purchase", "OpenAPI and AsyncAPI specs, llms.txt and Markdown twins of every docs page", "Errors page with codes, causes and fixes for HTTP and WebSocket, and Falcon 2.1 streaming reports concurrency in use on every response", "`encodedAsBase64` returns audio inline and Murf says nothing is stored", "SOC 2 Type II, ISO 27001 and ISO 42001 listed on the security page" ], "weaknesses": [ "Falcon 2.1 concurrency is 2 outside US-East on free and pay as you go, 5 on US-East", "`falcon-2` began serving Falcon 2.1 on 19 October 2026, announced the same day", "The security page says all data stays in AWS us-east-2, while Falcon 2.1 runs in 11 regions and the subprocessor list names four other clouds", "Download links last 72 hours per the TTS overview and 24 hours per the Enterprise FAQ", "Official SDK in Python only, last released 2026-03-05" ], "agentNotes": [ "Send `locale` on every request, since `multiNativeLocale` was replaced on 2026-03-05.", "Split text into chunks under 3,000 characters per request.", "Use the US-East host for 5 concurrent Falcon 2.1 calls instead of 2, and read `X-Murf-Concurrency-Remaining` before opening more", "Set `encodedAsBase64` to get audio inline and skip the expiring download link.", "Back off on 429 and close WebSocket contexts with `end: true` to free slots.", "Send `model: \"falcon-2.1\"` and list voices with the same `model`, since each model has its own voice catalogue" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 69.5 } ], "editorialScores": { "ergonomics": 71, "maintenance": 73, "payments": 40, "reliability": 90, "schema": 85, "security": 68, "transparency": 52 }, "provenanceScore": 81, "checked": { "categories": { "ergonomics": "2026-11-01", "maintenance": "2026-11-01", "payments": "2026-11-01", "reliability": "2026-11-01", "schema": "2026-11-01", "security": "2026-11-01", "transparency": "2026-11-01" }, "last": "2026-11-01", "lastMoved": "2026-11-01", "oldest": "2026-11-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl -X POST https://global.api.murf.ai/v1/speech/stream -H \"api-key: $MURF_API_KEY\" \\\n -H \"content-type: application/json\" -o hello.wav \\\n -d '{\"text\":\"Hi, how are you doing today?\",\"voiceId\":\"Gordon\",\"locale\":\"en-US\",\"model\":\"falcon-2\"}'", "claudeCode": "claude mcp add murf -e MURF_API_KEY=$MURF_API_KEY -- uvx murf-mcp", "config": { "mcpServers": { "murf": { "args": [ "murf-mcp" ], "command": "uvx", "env": { "MURF_API_KEY": "${MURF_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/speech.tts", "tool": "https://letme.dev/murf-tts" }, "sameCompany": [ "murf-voice-cloning" ], "area": "voice", "unitPrices": [ { "item": "Falcon 2", "unit": "1m-chars", "usd": 10, "note": "1 cent per 1,000 characters, pay as you go" }, { "item": "Gen2", "unit": "1m-chars", "usd": 30, "note": "$0.03 per 1,000 characters, pay as you go" } ], "provenance": { "legalEntity": "Murf Inc.", "domain": "murf.ai", "domainRegistered": "2020-07-17", "endpointOnVendorDomain": true, "terms": "https://murf.ai/resources/terms_of_service/", "privacy": "https://murf.ai/resources/privacy_policy/", "statusPage": "https://murf.statuspage.io", "changelog": "https://murf.ai/api/docs/changelog", "securityTxt": "none", "checked": "2026-11-01", "notes": [ "Impressum at https://murf.ai/legal/impressum names Murf Inc., 535 Mission Street, San Francisco", "The status page is on Atlassian's domain, linked from https://murf.ai/api/docs/resources/rate-limits", "murf.ai/.well-known/security.txt returned 404 on 1 November 2026." ], "score": 81 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/murf-tts.json", "live": { "slug": "murf-tts", "probe": { "target": "https://api.murf.ai/v1", "method": "get", "lastAt": "2026-11-07T19:22:20.789801166Z", "lastOk": true, "lastStatus": 404, "lastMs": 313, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 310, "p95ms24h": 383, "samples24h": 238, "samples30d": 7920, "days": [ { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 251, "ok": 251 }, { "date": "2026-10-29", "probes": 248, "ok": 248 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 197, "ok": 197 } ] }, "vendorStatus": { "page": "https://murf.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T19:22:46.145975538Z" }, "versions": [ { "registry": "github", "name": "murf-ai/murf-python-sdk", "version": "2.3.0", "released": "2026-03-05", "seenAt": "2026-11-06T23:47:46.714272474Z" }, { "registry": "pypi", "name": "murf", "version": "2.3.0", "released": "2026-03-05", "seenAt": "2026-11-06T23:47:44.625438725Z" }, { "registry": "pypi", "name": "murf-mcp", "version": "0.1.14", "released": "2026-08-20", "seenAt": "2026-11-06T23:47:44.812087409Z" } ], "githubStars": 109, "pypiWeekly": 822, "securityTxt": { "url": "https://murf.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T15:59:43.960693707Z" }, "llmsTxt": { "url": "https://murf.ai/api/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:33:15.036459214Z" }, "domain": { "domain": "murf.ai", "registered": "2020-07-17", "source": "https://rdap.identitydigital.services/rdap/domain/murf.ai", "checkedAt": "2026-11-01T14:19:12.529239665Z" }, "pages": [ { "url": "https://murf.ai/api/docs/changelog", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:14:41.203742831Z", "changedAt": "2026-11-06T13:36:31.523380439Z", "fingerprint": "1050f31c210d" }, { "url": "https://murf.ai/api/docs/changelog/2026/10/19", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:14:46.091312888Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "32968e847a32" }, { "url": "https://murf.ai/api/docs/changelog/2026/3/5", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:14:46.47298694Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "403585e8bd1c" }, { "url": "https://murf.ai/api/docs/changelog/2026/7/20", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:14:48.560624924Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "9f07d2b4b9f3" }, { "url": "https://murf.ai/pricing?product=api", "kind": "pricing", "status": 304, "checkedAt": "2026-11-07T14:14:50.542229356Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e3b0c44298fc" }, { "url": "https://murf.ai/resources/privacy_policy/", "kind": "privacy", "status": 304, "checkedAt": "2026-11-07T14:14:52.142193876Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fd6127aff3f7" }, { "url": "https://murf.ai/resources/terms_of_service/", "kind": "terms", "status": 304, "checkedAt": "2026-11-07T14:14:54.464438348Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "38c0780bf0e6" } ], "github": { "repo": "murf-ai/murf-python-sdk", "checkedAt": "2026-11-02T09:09:15.411538795Z", "stars": 109, "archived": false, "issuesEnabled": true, "pushedAt": "2026-03-05T12:41:06Z", "openIssues": 0, "openPRs": 0, "issuesOpened90d": 0, "issuesClosed90d": 0, "prsMerged90d": 0, "ci": { "branch": "main", "runs": 8, "success": 8, "failure": 0, "other": 0, "latest": "success", "latestAt": "2026-03-05T12:41:49Z" } }, "updatedAt": "2026-11-07T19:22:20.789801166Z" } }, "answer": "Murf TTS API + MCP scores 69.5 (B) on agent readiness against Smallest.ai Lightning TTS's 64.4 (B), and leads in 3 of 7 scored categories. Smallest.ai Lightning TTS leads on schema \u0026 documentation.", "b": { "slug": "smallest-lightning-tts", "name": "Smallest.ai Lightning TTS", "vendor": "Smallest AI", "vendorUrl": "https://smallest.ai", "kind": "model", "category": "text-to-speech", "summary": "Smallest AI's Lightning text-to-speech API turns text into 44.1 kHz speech over HTTP, server-sent events or WebSocket, with the Lightning v3.1 and v3.1 Pro models in up to 31 languages, pronunciation dictionaries and word timestamps.", "url": "https://www.anchorterminal.com/tools/smallest-lightning-tts", "markdownUrl": "https://www.anchorterminal.com/tools/smallest-lightning-tts.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/smallest-lightning-tts.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/smallest-lightning-tts.json", "dns": "smallest-lightning-tts.grade.anchorterminal.com", "repo": "https://github.com/smallest-inc/smallest-python-sdk", "transports": [ "http", "websocket" ], "packages": [ { "registry": "pypi", "name": "smallestai" }, { "registry": "npm", "name": "smallestai" }, { "registry": "npm", "name": "@developer-smallestai/smallest-mcp-server" } ], "auth": "api-key", "authNotes": "Bearer `sk_` API key created in the dashboard after a browser signup, shared by every model and the Voice Agents API. Keys are shown once, revoked by deleting them and carry no scopes. Servers can mint `wat_` access tokens for browsers (30 to 900 seconds, inference routes only).", "pricing": "usage", "pricingNotes": "Pay as you go at $0.175 per 10,000 characters for Lightning v3.1 and $0.195 for Lightning v3.1 Pro. $10 in trial credits. Pay as you go is capped at 450M characters a month. Enterprise pricing, SLA and zero data retention by quote.", "priceSummary": "Pay per use", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, OpenAPI file or pricing page (checked 2026-11-06). Credits are bought with a card on file.", "endpoints": [] }, "toolCount": 0, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.smallest.ai/models/text-to-speech/overview", "llmsTxt": "https://docs.smallest.ai/llms.txt", "openapi": "https://docs.smallest.ai/openapi/models-api.json", "capabilities": [ "speech.tts", "speech.streaming", "speech.voices", "speech.languages" ], "tags": [ "hosted", "usage", "closed-source", "python", "typescript", "openapi", "llms-txt", "streaming", "mcp", "enterprise", "self-hosted" ], "lastRelease": "2026-11-02", "graded": true, "anchor": { "graded": true, "score": 64.4, "grade": "B", "agentReady": false, "rank": 471, "ranked": true, "rankOf": 1510, "categoryRank": 9, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 72, "maintenance": 68, "payments": 40, "reliability": 58, "schema": 92, "security": 52, "transparency": 70 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Lightning streams speech over HTTP, SSE or WebSocket with OpenAPI and AsyncAPI files and public prices of $0.175 to $0.195 per 10,000 characters. The default model retires on 30 November with 28 days' notice, published concurrency limits disagree, and the shared API failed in every region on five days in September.", "bestFor": "Low-latency speech for voice agents, with English, Hindi code-switching and Indic voices.", "strengths": [ "OpenAPI 3.1 and AsyncAPI 2.6 files cover the sync, SSE and WebSocket routes, with llms.txt and Markdown copies of every page", "Public prices of $0.175 per 10,000 characters for v3.1 and $0.195 for v3.1 Pro, with $10 of trial credits", "Pronunciation dictionaries, number and date reading controls, word timestamps and eight output formats", "A deprecations page with dates and migration steps, and dated preview checkpoints that run 30 days", "Region-pinned hosts in Mumbai and Oregon" ], "weaknesses": [ "`lightning_v3.1`, the default model, retires on 30 November 2026 after a 2 November notice, and clones made on it stop working", "Concurrency is published as 1, 10 and 15 on three different pages", "Health checks on the shared API failed in all three regions on 9, 10, 13, 14 and 15 September 2026, the longest about 64 minutes", "Keys grant full account access with no scopes, and the docs pass keys or tokens as URL query parameters on WebSockets", "No SSML, and zero data retention only on Enterprise or a $1,000 a month add-on" ], "agentNotes": [ "Always send `\"model\": \"lightning_v3.1_pro\"`, since requests with no model go to a model that retires on 30 November 2026", "Pick voices from `GET /waves/v1/lightning-v3.1-pro/get_voices`, because the v3.1 and v3.1 Pro catalogues differ", "Keep each request under 8,000 characters and split longer text", "Treat 429 as the concurrency ceiling and retry with backoff from 500 ms to 30 s, honouring Retry-After", "Fix names and acronyms with a pronunciation dictionary, since SSML isn't accepted" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 64.4 } ], "editorialScores": { "ergonomics": 72, "maintenance": 68, "payments": 40, "reliability": 58, "schema": 92, "security": 52, "transparency": 52 }, "provenanceScore": 87, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "pip install smallestai", "http": "curl -X POST \"https://api.smallest.ai/waves/v1/tts\" \\\n -H \"Authorization: Bearer $SMALLEST_API_KEY\" -H \"Content-Type: application/json\" -H \"Accept: audio/wav\" \\\n -d '{\"text\": \"Hello from Smallest AI.\", \"voice_id\": \"meher\", \"model\": \"lightning_v3.1_pro\", \"sample_rate\": 24000, \"output_format\": \"wav\"}' \\\n --output hello.wav", "claudeCode": "claude mcp add smallest -- npx -y @developer-smallestai/smallest-mcp-server" }, "letme": { "capability": "https://letme.dev/speech.tts", "tool": "https://letme.dev/smallest-lightning-tts" }, "sameCompany": [ "smallest-pulse-stt", "smallest-voice-clone" ], "area": "voice", "unitPrices": [ { "item": "Lightning v3.1", "unit": "1m-chars", "usd": 17.5, "note": "$0.175 per 10,000 characters, pay as you go; model retiring 30 November 2026" }, { "item": "Lightning v3.1 Pro", "unit": "1m-chars", "usd": 19.5, "note": "$0.195 per 10,000 characters, pay as you go" } ], "provenance": { "legalEntity": "Smallest, Inc.", "domain": "smallest.ai", "domainRegistered": "2023-09-02", "endpointOnVendorDomain": true, "terms": "https://smallest.ai/terms-of-service", "privacy": "https://smallest.ai/privacy-policy", "statusPage": "https://status.smallest.ai/", "changelog": "https://docs.smallest.ai/changelog/models", "securityTxt": "valid", "checked": "2026-11-06", "notes": [ "The terms of service (effective 21 October 2026) name Smallest Inc., 311 California Street, Suite 320, San Francisco, under California law. The privacy policy (effective 18 September 2026) names Smallest, Inc. with a registered office in Lewes, Delaware.", "The terms forbid accessing or searching the services with spiders, robots, crawlers or similar data mining tools except through means Smallest makes available. Only public pages were read, with no account.", "smallest.ai/robots.txt allows all crawlers including ClaudeBot, with Content-Signal ai-train=yes, search=yes, ai-input=yes. docs.smallest.ai/robots.txt allows all paths except /api/fern-docs/.", "/.well-known/security.txt names security@smallest.ai and expires 31 December 2026. /security.txt returns 404.", "RDAP gives smallest.ai a registration date of 2 September 2023.", "Every docs page served as Markdown opens with a block addressed to AI assistants that says which models to prefer. It was read as data, not followed.", "firstReleased is left empty. No dated launch of the Models API was found on a page our reader may fetch." ], "score": 87 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/smallest-lightning-tts.json", "live": { "slug": "smallest-lightning-tts", "vendorStatus": { "page": "https://status.smallest.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-11-07T04:48:45.761951958Z" }, "versions": [ { "registry": "github", "name": "smallest-inc/smallest-python-sdk", "version": "v2.1.0", "released": "2025-03-04", "seenAt": "2026-11-07T00:06:35.435989203Z" }, { "registry": "npm", "name": "@developer-smallestai/smallest-mcp-server", "version": "0.11.2", "seenAt": "2026-11-07T00:06:33.7720962Z" }, { "registry": "npm", "name": "smallestai", "version": "1.0.1", "seenAt": "2026-11-07T00:06:32.999034745Z" }, { "registry": "pypi", "name": "smallestai", "version": "5.14.0", "released": "2026-10-07", "seenAt": "2026-11-07T00:06:32.730014258Z" } ], "githubStars": 42, "npmWeekly": 149, "pypiWeekly": 850, "securityTxt": { "url": "https://smallest.ai/.well-known/security.txt", "state": "valid", "expires": "2026-12-31T23:59:59.000Z", "checkedAt": "2026-11-07T16:01:21.76871346Z" }, "llmsTxt": { "url": "https://docs.smallest.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:33:56.775686182Z" }, "pages": [ { "url": "https://docs.smallest.ai/changelog/models", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:08:02.477867618Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5541546461b9" }, { "url": "https://smallest.ai/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:20:10.527086718Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "2296cee567f0" }, { "url": "https://smallest.ai/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:20:12.776174427Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "27186e5f758e" } ], "updatedAt": "2026-11-07T16:01:21.76871346Z" } }, "edges": [ { "by": 32, "category": "reliability", "leads": "murf-tts", "name": "Reliability", "reasons": { "a": "Atlassian status page at murf.statuspage.io, linked from the rate-limits doc, with history back to February 2024 (20). No incident posted since 2025-09-22, still so on 1 November 2026, so the 90-day record is clean. The page tracks only two components (API and Studio), so a clean record says less than a page with a component per region (30). Concurrency limits published per model and region, 5 on US-East and 2 elsewhere for Falcon 2.1 on free and pay as you go, and since 22 October Falcon 2.1 streaming responses report the region, limit and slots in use (15). The errors page tells you to retry 429, 500 and 503 with exponential backoff (15). No SLA found on any self-serve tier (0). Falcon 2.1 carries no beta label (10).", "b": "BetterStack status page at status.smallest.ai with components for the Global, India and USA APIs (one health check covers the Agents and Models APIs), docs, the app and Electron, and per-component history (20). In the 90 days from 8 August the health checks on the shared API failed in all three regions on 9, 10, 13, 14 and 15 September (about 8, 21, 33, 17 and 64 minutes of flapping), in the Global and India regions on 11 and 17 September (12 minutes each), and in the USA region alone on 1, 3, 5, 12, 21 and 30 September (6 to 62 minutes) and 6 October (12 minutes). Outages in every region at once are read as wide errors, so several majors (0). Limits are published with numbers but disagree. The limits page says one TTS request at a time per account with up to five sockets, the Lightning v3.1 Pro card says 10 concurrent and the pricing page says 15 streams and 100 requests a minute on pay as you go (8 of 15). 429 is documented with exponential backoff from 500 ms to 30 s and Retry-After when present, and the limits page tells clients to expect 429s at the concurrency ceiling (15). An infrastructure SLA of 99.99 per cent is named for Enterprise only, with no terms, and the terms disclaim any availability commitment (5 of 10). `lightning_v3.1_pro` is stable and only the dated checkpoint is preview (10). 20 + 0 + 8 + 15 + 5 + 10 = 58." }, "scores": { "a": 90, "b": 58 } }, { "by": 16, "category": "security", "leads": "murf-tts", "name": "Security \u0026 auth", "reasons": { "a": "Model reading of the checklist, with training and retention in place of least-privilege and injection lines. One `api-key` header, plus a generate-token endpoint for short-lived client tokens. No key scopes found (23 of 30). The docs say customer text and audio never feed Murf's model training (20). Download links last 72 hours by the TTS overview and 24 hours by the Enterprise FAQ, and `encodedAsBase64` returns audio with nothing stored, so zero retention is self-serve but not the default (10 of 15). The dashboard shows daily and monthly usage, not per-call logs (5 of 15). SOC 2 Type II, ISO 27001 and ISO 42001 on the security page. No security.txt, disclosure policy or bug bounty found (10 of 20).", "b": "Model reading of the checklist, with training and retention in place of the least-privilege and injection lines. Plain `sk_` keys per organisation, shown once, revoked at once and deletable, with one key per environment advised. The docs say a key grants full account access, and no scope is offered. Short-lived access tokens (`wat_`, 30 to 900 seconds) cover only inference routes and can't mint tokens (22 of 30). The error reference documents the key as a `?token=` query parameter for browser WebSockets, and the token guide passes access tokens as `?api_key=` on the STT socket, so 10 off (12 of 30). The terms (21 October 2026) say Smallest won't use user content or input to train or improve its services. The privacy policy (18 September 2026) lists improving the services with machine learning as a use of usage data and doesn't address uploaded audio or text either way (15 of 20). Zero data retention and the `x-expire-content` header are Enterprise only, or a $1,000 a month HIPAA add-on on pay as you go. Other plans keep content readable in logs and the dashboard, with no retention period published (5 of 15). Usage is tracked per key, request rows sit in a dashboard log viewer, and every response carries `x-request-id`. No audit log of key actions was found (10 of 15). security.txt is valid to 31 December 2026 and the site footer claims SOC 2, GDPR and HIPAA compliance, while the pricing page lists SOC 2 compliance only on Enterprise. No bug bounty, disclosure policy or public advisories found (10 of 20). Total 52." }, "scores": { "a": 68, "b": 52 } }, { "by": 7, "category": "schema", "leads": "smallest-lightning-tts", "name": "Schema \u0026 documentation", "reasons": { "a": "OpenAPI and AsyncAPI specs listed in llms.txt (25). llms.txt with Markdown twins of every page (10). Model pages say which model suits voice agents and which suits studio renders, and the changelog flags Gen2 streaming as deprecated (15 of 20). Typed request bodies in the spec, with `text`, `voiceId` and `locale` required. We didn't check every enum (10 of 15). The errors page lists 7 HTTP codes, 4 WebSocket errors and 8 warnings, each with cause and fix, but covers only the streaming and WebSocket APIs (13 of 15). Dated public changelog, a single `/v1` path and one breaking rename in 2026 (`multiNativeLocale` to `locale` on 2026-03-05) (12 of 15).", "b": "OpenAPI 3.1 for the sync and SSE routes and AsyncAPI 2.6 for the WebSocket, with request and event schemas (25). llms.txt and a Markdown copy of every page (10). A transport guide, model cards and the compare page say which model and transport suit which job, but changelog entries correct the language lists and enums the docs and spec carried (15 of 20). Typed fields with enums for model, sample rate, language and output format, an 8,000-character limit and pattern rules on `session_id` and `request_id` (14 of 15). Examples in curl, Python and JavaScript, with error bodies on the reference and a shared error page (13 of 15). Versioned `/v1` paths, a dated Lightning changelog and dated preview checkpoints (15). Total 92." }, "scores": { "a": 85, "b": 92 } }, { "by": 5, "category": "maintenance", "leads": "murf-tts", "name": "Maintenance \u0026 community", "reasons": { "a": "Read as a model. Newest changelog entry 2026-10-27 (List Voices takes a model), after Falcon 2.1 on 2026-10-19 (30). Seven dated changelog entries in the 90 days from 3 August, on 5, 9, 13, 15, 19, 22 and 27 October, plus `murf-mcp` 0.1.14 on 2026-08-20 (10). Gen2 streaming was switched off on 2026-10-05 after a 20 July notice that named only the 16 August deprecation date, and on 19 October `falcon-2` began serving Falcon 2.1, announced the same day (0 of 10). Public changelog and a help centre (10 of 15). The Python SDK had no open issues on 1 October, per that check, not re-read on 1 November (8 of 10). Official SDK in Python only, 2.3.0 still the newest tag on 1 November, from 2026-03-05 (8 of 15). Fern-generated with a CI workflow, Python 3.8 and later (7 of 10). 30+10+0+10+8+8+7 = 73.", "b": "Read as a model. The newest Lightning changelog entry is dated 2 November 2026 (the v3.1 retirement notice), after a preview checkpoint on 29 October (30). Dated Lightning entries on 10, 23 and 28 August, 29 September, 14, 17 and 29 October and 2 November count, less 5 for churn, because the default model retires 28 days after its notice and clones made on it stop working (15 of 20). Public changelog, email support and a Discord server, with no evidence read of how they answer (10 of 15). The Python SDK `smallestai` 5.14.0 dates from 7 October, but the npm Node SDK has not been published since May 2025 (8 of 15). The Python SDK repository runs CI and release workflows, but has no licence file (5 of 10). Total 68." }, "scores": { "a": 73, "b": 68 } } ], "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "Murf", "b": "Smallest AI", "name": "Vendor" }, { "a": "https://api.murf.ai/v1", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP, stdio", "b": "HTTP, websocket", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT (SDK and MCP server)", "b": "none", "name": "Licence" }, { "a": "none", "b": "0", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-08-20", "b": "2026-11-02", "name": "Last release" }, { "a": "no date given", "b": "no date given", "name": "Terms last updated" }, { "a": "no date given", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "108 stars, 669 PyPI/wk", "b": "none", "name": "Popularity" }, { "a": "3.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Murf TTS API + MCP scores 69.5 (B) on agent readiness against Smallest.ai Lightning TTS's 64.4 (B), and leads in 3 of 7 scored categories. Smallest.ai Lightning TTS leads on schema \u0026 documentation.", "question": "Which is better for AI agents, Murf TTS API + MCP or Smallest.ai Lightning TTS?" }, { "answer": "Both need an API key.", "question": "Do Murf TTS API + MCP and Smallest.ai Lightning TTS need an API key?" }, { "answer": "Murf TTS API + MCP has a hosted endpoint at https://api.murf.ai/v1. No hosted endpoint is listed for Smallest.ai Lightning TTS.", "question": "Can an agent call Murf TTS API + MCP and Smallest.ai Lightning TTS without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 90 against 58", "Security \u0026 auth, 68 against 52", "Maintenance \u0026 community, 73 against 68" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine" ], "goodFor": "Budget voice-agent output where 2 to 5 concurrent streams are enough, or for studio-style renders on Gen2.", "slug": "murf-tts", "watchFor": "Falcon 2.1 concurrency is 2 outside US-East on free and pay as you go, 5 on US-East" }, { "aheadOn": [ "Schema \u0026 documentation, 92 against 85" ], "also": [ "No incidents deducted, where Murf TTS API + MCP loses 3 points for them" ], "goodFor": "Low-latency speech for voice agents, with English, Hindi code-switching and Indic voices.", "slug": "smallest-lightning-tts", "watchFor": "`lightning_v3.1`, the default model, retires on 30 November 2026 after a 2 November notice, and clones made on it stop working" } ], "history": { "murf-tts": [ { "causes": [ "product", "event" ], "date": "2026-11-01", "delta": -1.3, "from": 70.8, "fromGrade": "BB", "to": 69.5, "toGrade": "B" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.2, "from": 70.6, "fromGrade": "BB", "to": 70.8, "toGrade": "BB" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.3, "from": 70.9, "fromGrade": "BB", "to": 70.6, "toGrade": "BB" } ], "smallest-lightning-tts": null }, "job": { "capability": "speech.tts", "name": "Text-to-speech" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-murf-tts.json", "title": "Amazon Polly vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-smallest-lightning-tts.json", "title": "Amazon Polly vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts.json", "title": "Azure AI Speech text-to-speech vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-smallest-lightning-tts.json", "title": "Azure AI Speech text-to-speech vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/cartesia-tts-vs-murf-tts.json", "title": "Cartesia Sonic TTS API + MCP vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/cartesia-tts-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/cartesia-tts-vs-smallest-lightning-tts.json", "title": "Cartesia Sonic TTS API + MCP vs Smallest.ai Lightning TTS", "url": 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"json": "https://www.anchorterminal.com/compare/minimax-speech-vs-murf-tts.json", "title": "MiniMax Speech (T2A) vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/minimax-speech-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/minimax-speech-vs-smallest-lightning-tts.json", "title": "MiniMax Speech (T2A) vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/minimax-speech-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/murf-tts-vs-playht-tts.json", "title": "Murf TTS API + MCP vs PlayHT Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/murf-tts-vs-playht-tts" }, { "json": "https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts.json", "title": "Murf TTS API + MCP vs Resemble AI Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts" }, { "json": "https://www.anchorterminal.com/compare/murf-tts-vs-rime-tts.json", "title": "Murf TTS API + MCP vs Rime TTS API + MCP", "url": "https://www.anchorterminal.com/compare/murf-tts-vs-rime-tts" }, { "json": "https://www.anchorterminal.com/compare/murf-tts-vs-soniox-tts.json", "title": "Murf TTS API + MCP vs Soniox Text-to-Speech", "url": "https://www.anchorterminal.com/compare/murf-tts-vs-soniox-tts" }, { "json": "https://www.anchorterminal.com/compare/playht-tts-vs-smallest-lightning-tts.json", "title": "PlayHT Text-to-Speech API vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/playht-tts-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/resemble-ai-tts-vs-smallest-lightning-tts.json", "title": "Resemble AI Text-to-Speech API vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/resemble-ai-tts-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/rime-tts-vs-smallest-lightning-tts.json", "title": "Rime TTS API + MCP vs Smallest.ai Lightning TTS", "url": "https://www.anchorterminal.com/compare/rime-tts-vs-smallest-lightning-tts" }, { "json": "https://www.anchorterminal.com/compare/smallest-lightning-tts-vs-soniox-tts.json", "title": "Smallest.ai Lightning TTS vs Soniox Text-to-Speech", "url": "https://www.anchorterminal.com/compare/smallest-lightning-tts-vs-soniox-tts" } ], "panel": null, "scores": [ { "by": 32, "edge": "murf-tts", "key": "reliability", "murf-tts": 90, "name": "Reliability", "smallest-lightning-tts": 58, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 7, "edge": "smallest-lightning-tts", "key": "schema", "murf-tts": 85, "name": "Schema \u0026 documentation", "smallest-lightning-tts": 92, "weight": 13 }, { "by": 1, "edge": "smallest-lightning-tts", "key": "ergonomics", "murf-tts": 71, "name": "Agent ergonomics", "smallest-lightning-tts": 72, "weight": 13 }, { "by": 16, "edge": "murf-tts", "key": "security", "murf-tts": 68, "name": "Security \u0026 auth", "smallest-lightning-tts": 52, "weight": 14 }, { "by": 0, "edge": "", "key": "payments", "murf-tts": 40, "name": "Payments \u0026 pricing", "smallest-lightning-tts": 40, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 5, "edge": "murf-tts", "key": "maintenance", "murf-tts": 73, "name": "Maintenance \u0026 community", "smallest-lightning-tts": 68, "weight": 7 }, { "by": 3, "edge": "smallest-lightning-tts", "key": "transparency", "murf-tts": 67, "name": "Transparency \u0026 trust", "smallest-lightning-tts": 70, "weight": 7 } ], "summary": "Murf TTS API + MCP scores 69.5 (B) on agent readiness against Smallest.ai Lightning TTS's 64.4 (B), and leads in 3 of 7 scored categories. Smallest.ai Lightning TTS leads on schema \u0026 documentation. Both do text-to-speech.", "tasks": [ { "a": "$0.09 to $0.27", "b": "$0.16 to $0.18", "cheaper": "murf-tts", "task": "Narrate a 9,000-character script", "what": "about 1,500 words" } ], "tutorials": [], "verdicts": { "murf-tts": "Falcon 2.1 costs 1 cent per 1,000 characters on pay as you go, with a $2 minimum purchase. Concurrency is 2 outside US-East on free and pay as you go, 5 on US-East, and on 19 October 2026 the `falcon-2` identifier switched to Falcon 2.1 on the day it was announced.", "smallest-lightning-tts": "Lightning streams speech over HTTP, SSE or WebSocket with OpenAPI and AsyncAPI files and public prices of $0.175 to $0.195 per 10,000 characters. The default model retires on 30 November with 28 days' notice, published concurrency limits disagree, and the shared API failed in every region on five days in September." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts", "json": "https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts.min.md" }, "markdown": "Murf TTS API + MCP scores 69.5 (B) on agent readiness against Smallest.ai Lightning TTS's 64.4 (B), and leads in 3 of 7 scored categories. Smallest.ai Lightning TTS leads on schema \u0026 documentation. Both do text-to-speech.\n\n- Murf TTS API + MCP: grade B, 69.5/100, rank #240 of 1510. Markdown https://www.anchorterminal.com/tools/murf-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/murf-tts.json\n- Smallest.ai Lightning TTS: grade B, 64.4/100, rank #471 of 1510. Markdown https://www.anchorterminal.com/tools/smallest-lightning-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/smallest-lightning-tts.json\n- Best text-to-speech APIs for AI agents: https://www.anchorterminal.com/best/text-to-speech/index.md\n- All 148 tts comparisons: https://www.anchorterminal.com/compare/text-to-speech/index.md\n\n## Which one, for what\n\n### Murf TTS API + MCP (B)\n\nGood for: Budget voice-agent output where 2 to 5 concurrent streams are enough, or for studio-style renders on Gen2.\n\nAhead on:\n- Reliability, 90 against 58\n- Security \u0026 auth, 68 against 52\n- Maintenance \u0026 community, 73 against 68\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n\nWatch for: Falcon 2.1 concurrency is 2 outside US-East on free and pay as you go, 5 on US-East\n\n### Smallest.ai Lightning TTS (B)\n\nGood for: Low-latency speech for voice agents, with English, Hindi code-switching and Indic voices.\n\nAhead on:\n- Schema \u0026 documentation, 92 against 85\n\nAlso in its favour:\n- No incidents deducted, where Murf TTS API + MCP loses 3 points for them\n\nWatch for: `lightning_v3.1`, the default model, retires on 30 November 2026 after a 2 November notice, and clones made on it stop working\n\n\n## Why the edge\n\n### Reliability: Murf TTS API + MCP +32\n\n- Murf TTS API + MCP (90): Atlassian status page at murf.statuspage.io, linked from the rate-limits doc, with history back to February 2024 (20). No incident posted since 2025-09-22, still so on 1 November 2026, so the 90-day record is clean. The page tracks only two components (API and Studio), so a clean record says less than a page with a component per region (30). Concurrency limits published per model and region, 5 on US-East and 2 elsewhere for Falcon 2.1 on free and pay as you go, and since 22 October Falcon 2.1 streaming responses report the region, limit and slots in use (15). The errors page tells you to retry 429, 500 and 503 with exponential backoff (15). No SLA found on any self-serve tier (0). Falcon 2.1 carries no beta label (10).\n- Smallest.ai Lightning TTS (58): BetterStack status page at status.smallest.ai with components for the Global, India and USA APIs (one health check covers the Agents and Models APIs), docs, the app and Electron, and per-component history (20). In the 90 days from 8 August the health checks on the shared API failed in all three regions on 9, 10, 13, 14 and 15 September (about 8, 21, 33, 17 and 64 minutes of flapping), in the Global and India regions on 11 and 17 September (12 minutes each), and in the USA region alone on 1, 3, 5, 12, 21 and 30 September (6 to 62 minutes) and 6 October (12 minutes). Outages in every region at once are read as wide errors, so several majors (0). Limits are published with numbers but disagree. The limits page says one TTS request at a time per account with up to five sockets, the Lightning v3.1 Pro card says 10 concurrent and the pricing page says 15 streams and 100 requests a minute on pay as you go (8 of 15). 429 is documented with exponential backoff from 500 ms to 30 s and Retry-After when present, and the limits page tells clients to expect 429s at the concurrency ceiling (15). An infrastructure SLA of 99.99 per cent is named for Enterprise only, with no terms, and the terms disclaim any availability commitment (5 of 10). `lightning_v3.1_pro` is stable and only the dated checkpoint is preview (10). 20 + 0 + 8 + 15 + 5 + 10 = 58.\n\n### Security \u0026 auth: Murf TTS API + MCP +16\n\n- Murf TTS API + MCP (68): Model reading of the checklist, with training and retention in place of least-privilege and injection lines. One `api-key` header, plus a generate-token endpoint for short-lived client tokens. No key scopes found (23 of 30). The docs say customer text and audio never feed Murf's model training (20). Download links last 72 hours by the TTS overview and 24 hours by the Enterprise FAQ, and `encodedAsBase64` returns audio with nothing stored, so zero retention is self-serve but not the default (10 of 15). The dashboard shows daily and monthly usage, not per-call logs (5 of 15). SOC 2 Type II, ISO 27001 and ISO 42001 on the security page. No security.txt, disclosure policy or bug bounty found (10 of 20).\n- Smallest.ai Lightning TTS (52): Model reading of the checklist, with training and retention in place of the least-privilege and injection lines. Plain `sk_` keys per organisation, shown once, revoked at once and deletable, with one key per environment advised. The docs say a key grants full account access, and no scope is offered. Short-lived access tokens (`wat_`, 30 to 900 seconds) cover only inference routes and can't mint tokens (22 of 30). The error reference documents the key as a `?token=` query parameter for browser WebSockets, and the token guide passes access tokens as `?api_key=` on the STT socket, so 10 off (12 of 30). The terms (21 October 2026) say Smallest won't use user content or input to train or improve its services. The privacy policy (18 September 2026) lists improving the services with machine learning as a use of usage data and doesn't address uploaded audio or text either way (15 of 20). Zero data retention and the `x-expire-content` header are Enterprise only, or a $1,000 a month HIPAA add-on on pay as you go. Other plans keep content readable in logs and the dashboard, with no retention period published (5 of 15). Usage is tracked per key, request rows sit in a dashboard log viewer, and every response carries `x-request-id`. No audit log of key actions was found (10 of 15). security.txt is valid to 31 December 2026 and the site footer claims SOC 2, GDPR and HIPAA compliance, while the pricing page lists SOC 2 compliance only on Enterprise. No bug bounty, disclosure policy or public advisories found (10 of 20). Total 52.\n\n### Schema \u0026 documentation: Smallest.ai Lightning TTS +7\n\n- Murf TTS API + MCP (85): OpenAPI and AsyncAPI specs listed in llms.txt (25). llms.txt with Markdown twins of every page (10). Model pages say which model suits voice agents and which suits studio renders, and the changelog flags Gen2 streaming as deprecated (15 of 20). Typed request bodies in the spec, with `text`, `voiceId` and `locale` required. We didn't check every enum (10 of 15). The errors page lists 7 HTTP codes, 4 WebSocket errors and 8 warnings, each with cause and fix, but covers only the streaming and WebSocket APIs (13 of 15). Dated public changelog, a single `/v1` path and one breaking rename in 2026 (`multiNativeLocale` to `locale` on 2026-03-05) (12 of 15).\n- Smallest.ai Lightning TTS (92): OpenAPI 3.1 for the sync and SSE routes and AsyncAPI 2.6 for the WebSocket, with request and event schemas (25). llms.txt and a Markdown copy of every page (10). A transport guide, model cards and the compare page say which model and transport suit which job, but changelog entries correct the language lists and enums the docs and spec carried (15 of 20). Typed fields with enums for model, sample rate, language and output format, an 8,000-character limit and pattern rules on `session_id` and `request_id` (14 of 15). Examples in curl, Python and JavaScript, with error bodies on the reference and a shared error page (13 of 15). Versioned `/v1` paths, a dated Lightning changelog and dated preview checkpoints (15). Total 92.\n\n### Maintenance \u0026 community: Murf TTS API + MCP +5\n\n- Murf TTS API + MCP (73): Read as a model. Newest changelog entry 2026-10-27 (List Voices takes a model), after Falcon 2.1 on 2026-10-19 (30). Seven dated changelog entries in the 90 days from 3 August, on 5, 9, 13, 15, 19, 22 and 27 October, plus `murf-mcp` 0.1.14 on 2026-08-20 (10). Gen2 streaming was switched off on 2026-10-05 after a 20 July notice that named only the 16 August deprecation date, and on 19 October `falcon-2` began serving Falcon 2.1, announced the same day (0 of 10). Public changelog and a help centre (10 of 15). The Python SDK had no open issues on 1 October, per that check, not re-read on 1 November (8 of 10). Official SDK in Python only, 2.3.0 still the newest tag on 1 November, from 2026-03-05 (8 of 15). Fern-generated with a CI workflow, Python 3.8 and later (7 of 10). 30+10+0+10+8+8+7 = 73.\n- Smallest.ai Lightning TTS (68): Read as a model. The newest Lightning changelog entry is dated 2 November 2026 (the v3.1 retirement notice), after a preview checkpoint on 29 October (30). Dated Lightning entries on 10, 23 and 28 August, 29 September, 14, 17 and 29 October and 2 November count, less 5 for churn, because the default model retires 28 days after its notice and clones made on it stop working (15 of 20). Public changelog, email support and a Discord server, with no evidence read of how they answer (10 of 15). The Python SDK `smallestai` 5.14.0 dates from 7 October, but the npm Node SDK has not been published since May 2025 (8 of 15). The Python SDK repository runs CI and release workflows, but has no licence file (5 of 10). Total 68.\n\n## Score by category\n\n| Category | Weight | Murf TTS API + MCP | Smallest.ai Lightning TTS | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 90 | 58 | Murf TTS API + MCP +32 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 92 | Smallest.ai Lightning TTS +7 |\n| Agent ergonomics | 13% (16.2 this run) | 71 | 72 | Smallest.ai Lightning TTS +1 |\n| Security \u0026 auth | 14% (17.5 this run) | 68 | 52 | Murf TTS API + MCP +16 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 73 | 68 | Murf TTS API + MCP +5 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 67 | 70 | Smallest.ai Lightning TTS +3 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **69.5 · B** | **64.4 · B** | |\n\n## Facts side by side\n\n| Fact | Murf TTS API + MCP | Smallest.ai Lightning TTS |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Murf | Smallest AI |\n| Hosted endpoint | `https://api.murf.ai/v1` | no (local only) |\n| Transports | HTTP, stdio | HTTP, websocket |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT (SDK and MCP server) | none |\n| Tools exposed | none | 0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-08-20 | 2026-11-02 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | no date given | no date given |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | yes | not found in the text |\n| Terms restrict benchmarking | yes | not found in the text |\n| Terms or service can change without notice | yes | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 108 stars, 669 PyPI/wk | none |\n| Agent reviews | 3.5/5 (2) | none |\n\n## What the same task costs\n\n| Task | Murf TTS API + MCP | Smallest.ai Lightning TTS |\n| --- | --- | --- |\n| Narrate a 9,000-character script | $0.09 to $0.27 | $0.16 to $0.18 |\n\n## How the scores have moved\n\n### Murf TTS API + MCP\n\n- -1.3 on 1 November 2026 (BB to B): product, negative event\n- +0.2 on 27 October 2026: checklist\n- -0.3 on 8 October 2026: checklist\n\n### Smallest.ai Lightning TTS\n\nNo score change since it was listed.\n\n## Verdicts\n\n**Murf TTS API + MCP.** Falcon 2.1 costs 1 cent per 1,000 characters on pay as you go, with a $2 minimum purchase. Concurrency is 2 outside US-East on free and pay as you go, 5 on US-East, and on 19 October 2026 the `falcon-2` identifier switched to Falcon 2.1 on the day it was announced.\n\n**Smallest.ai Lightning TTS.** Lightning streams speech over HTTP, SSE or WebSocket with OpenAPI and AsyncAPI files and public prices of $0.175 to $0.195 per 10,000 characters. The default model retires on 30 November with 28 days' notice, published concurrency limits disagree, and the shared API failed in every region on five days in September.\n\n## Before you call either\n\n### Murf TTS API + MCP\n\n1. Send `locale` on every request, since `multiNativeLocale` was replaced on 2026-03-05.\n2. Split text into chunks under 3,000 characters per request.\n3. Use the US-East host for 5 concurrent Falcon 2.1 calls instead of 2, and read `X-Murf-Concurrency-Remaining` before opening more\n4. Set `encodedAsBase64` to get audio inline and skip the expiring download link.\n5. Back off on 429 and close WebSocket contexts with `end: true` to free slots.\n6. Send `model: \"falcon-2.1\"` and list voices with the same `model`, since each model has its own voice catalogue\n\n### Smallest.ai Lightning TTS\n\n1. Always send `\"model\": \"lightning_v3.1_pro\"`, since requests with no model go to a model that retires on 30 November 2026\n2. Pick voices from `GET /waves/v1/lightning-v3.1-pro/get_voices`, because the v3.1 and v3.1 Pro catalogues differ\n3. Keep each request under 8,000 characters and split longer text\n4. Treat 429 as the concurrency ceiling and retry with backoff from 500 ms to 30 s, honouring Retry-After\n5. Fix names and acronyms with a pronunciation dictionary, since SSML isn't accepted\n\n## Questions\n\n### Which is better for AI agents, Murf TTS API + MCP or Smallest.ai Lightning TTS?\n\nMurf TTS API + MCP scores 69.5 (B) on agent readiness against Smallest.ai Lightning TTS's 64.4 (B), and leads in 3 of 7 scored categories. Smallest.ai Lightning TTS leads on schema \u0026 documentation.\n\n### Do Murf TTS API + MCP and Smallest.ai Lightning TTS need an API key?\n\nBoth need an API key.\n\n### Can an agent call Murf TTS API + MCP and Smallest.ai Lightning TTS without installing anything?\n\nMurf TTS API + MCP has a hosted endpoint at https://api.murf.ai/v1. No hosted endpoint is listed for Smallest.ai Lightning TTS.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts.json, and with the fewest tokens: https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"murf-tts\", \"b\": \"smallest-lightning-tts\"}`. From a terminal: `anchor compare murf-tts smallest-lightning-tts`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/murf-tts.json and https://www.anchorterminal.com/api/v1/tools/smallest-lightning-tts.json\n\n## Other comparisons with Murf TTS API + MCP or Smallest.ai Lightning TTS\n\n- [Amazon Polly vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/amazon-polly-vs-murf-tts.md)\n- [Amazon Polly vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/amazon-polly-vs-smallest-lightning-tts.md)\n- [Azure AI Speech text-to-speech vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts.md)\n- [Azure AI Speech text-to-speech vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-smallest-lightning-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/cartesia-tts-vs-murf-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/cartesia-tts-vs-smallest-lightning-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/deepgram-tts-vs-murf-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/deepgram-tts-vs-smallest-lightning-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-murf-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-smallest-lightning-tts.md)\n- [Fish Audio TTS API vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts.md)\n- [Fish Audio TTS API vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/fish-audio-tts-vs-smallest-lightning-tts.md)\n- [Google Cloud Text-to-Speech vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/google-cloud-tts-vs-murf-tts.md)\n- [Google Cloud Text-to-Speech vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/google-cloud-tts-vs-smallest-lightning-tts.md)\n- [HeyGen Voice vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/heygen-voice-vs-murf-tts.md)\n- [HeyGen Voice vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/heygen-voice-vs-smallest-lightning-tts.md)\n- [Inworld Realtime TTS-2 vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/inworld-tts-vs-murf-tts.md)\n- [Inworld Realtime TTS-2 vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/inworld-tts-vs-smallest-lightning-tts.md)\n- [MiniMax Speech (T2A) vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/minimax-speech-vs-murf-tts.md)\n- [MiniMax Speech (T2A) vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/minimax-speech-vs-smallest-lightning-tts.md)\n- [Murf TTS API + MCP vs PlayHT Text-to-Speech API](https://www.anchorterminal.com/compare/murf-tts-vs-playht-tts.md)\n- [Murf TTS API + MCP vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts.md)\n- [Murf TTS API + MCP vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/murf-tts-vs-rime-tts.md)\n- [Murf TTS API + MCP vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/murf-tts-vs-soniox-tts.md)\n- [PlayHT Text-to-Speech API vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/playht-tts-vs-smallest-lightning-tts.md)\n- [Resemble AI Text-to-Speech API vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/resemble-ai-tts-vs-smallest-lightning-tts.md)\n- [Rime TTS API + MCP vs Smallest.ai Lightning TTS](https://www.anchorterminal.com/compare/rime-tts-vs-smallest-lightning-tts.md)\n- [Smallest.ai Lightning TTS vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/smallest-lightning-tts-vs-soniox-tts.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Murf TTS API + MCP vs Smallest.ai Lightning TTS", "url": "" } ], "description": "Murf TTS scores 69.5 (B) to Smallest.ai Lightning TTS's 64.4 (B) for text-to-speech. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Murf TTS API + MCP B 69.5", "Smallest.ai Lightning TTS B 64.4", "scores" ], "h1": "Murf TTS API + MCP vs Smallest.ai Lightning TTS", "image": "https://www.anchorterminal.com/assets/og/default.png", "path": "/compare/murf-tts-vs-smallest-lightning-tts", "published": "2026-10-01", "section": "tools", "title": "Murf TTS vs Smallest.ai Lightning TTS for AI agents (2026)", "toc": null, "updated": "2026-11-07", "url": "https://www.anchorterminal.com/compare/murf-tts-vs-smallest-lightning-tts" }, "tokens": { "markdown": 4850, "slim": 2580 }, "version": 1 }