{ "data": { "a": { "slug": "amazon-nova-sonic", "name": "Amazon Nova 2 Sonic", "vendor": "Amazon Web Services", "vendorUrl": "https://aws.amazon.com/ai/generative-ai/nova/speech/", "kind": "http-api", "category": "voice-agents", "summary": "Amazon Nova 2 Sonic is AWS's speech-to-speech model for voice agents on Amazon Bedrock. Clients stream audio and text events both ways over the `InvokeModelWithBidirectionalStream` API, with turn-taking, interruptions, asynchronous tool calls and multilingual voices.", "url": "https://www.anchorterminal.com/tools/amazon-nova-sonic", "markdownUrl": "https://www.anchorterminal.com/tools/amazon-nova-sonic.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/amazon-nova-sonic.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/amazon-nova-sonic.json", "dns": "amazon-nova-sonic.grade.anchorterminal.com", "repo": "https://github.com/aws-samples/amazon-nova-samples", "transports": [ "http" ], "packages": [ { "registry": "pypi", "name": "aws-sdk-bedrock-runtime" }, { "registry": "npm", "name": "@aws-sdk/client-bedrock-runtime" } ], "auth": "api-key", "authNotes": "AWS Signature Version 4 with IAM credentials or a role, scoped per model ARN by IAM policy. The Sonic quickstart signs with environment credentials. Whether Bedrock API keys work on the bidirectional stream wasn't confirmed. Access is self-serve once a person has an AWS account.", "pricing": "usage", "pricingNotes": "Billed per speech and text token on Bedrock on demand. The Nova and Bedrock pricing pages draw their price tables by script, so the figures weren't read on 6 November 2026. No model-specific free tier; new AWS accounts get up to $200 in Free Tier credits.", "priceSummary": "Pay per use", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the Nova or Bedrock docs (checked 2026-11-06). Billing runs through the AWS account.", "endpoints": [] }, "toolCount": 0, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.aws.amazon.com/nova/latest/nova2-userguide/using-conversational-speech.html", "llmsTxt": "https://docs.aws.amazon.com/nova/latest/nova2-userguide/llms.txt", "capabilities": [ "voice.agent", "voice.speech-to-speech", "voice.tools", "voice.telephony" ], "tags": [ "official", "hosted", "usage-priced", "closed-source", "python", "typescript", "llms-txt", "streaming", "enterprise" ], "lastRelease": "2026-05-28", "graded": true, "anchor": { "graded": true, "score": 67.6, "grade": "B", "agentReady": false, "rank": 314, "ranked": true, "rankOf": 1486, "categoryRank": 6, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 64, "maintenance": 50, "payments": 10, "reliability": 95, "schema": 75, "security": 77, "transparency": 79 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "low", "date": "2026-11-06" }, "negative": 0, "verdict": "Nova 2 Sonic runs speech-to-speech conversations with asynchronous tools on Bedrock, with IAM scoping, no default storage of inputs and a 99.9 per cent SLA. Sessions cut off at 8 minutes, the Python SDK is pre-alpha, and the event payloads have no schema file. Prices are in a script-drawn table we couldn't read.", "bestFor": "Voice agents on AWS, call centres on Amazon Connect, teams that want IAM and in-account data handling.", "strengths": [ "No Bedrock event on the AWS Health history in the 90 days from 8 August 2026", "IAM scoping per model ARN with SigV4 and temporary credentials", "Bedrock stores no inputs or outputs by default, and Sonic isn't on the list of models kept for abuse review", "Asynchronous tool calls let the model keep speaking while a tool runs", "Telephony guides for Twilio, Vonage and Amazon Connect" ], "weaknesses": [ "Connections end after 8 minutes, so long calls need the session-continuation pattern", "The Python SDK for bidirectional streaming is pre-alpha and needs Python 3.12", "Sonic's event payloads are documented as examples, with no schema file", "20 concurrent sessions per Region, not adjustable through Service Quotas", "The March and May 2026 refreshes changed the model in place under the same ID" ], "agentNotes": [ "Plan a reconnect before 8 minutes and replay chat history (up to 200 KB) at the start of the new session", "Send session, prompt and content start events in order before any audio", "Make tool calls safe to repeat, since a reconnect can replay them", "Back off on `ThrottlingException` and stay within 20 concurrent sessions per Region", "Use the polyglot voices TIFFANY or MATTHEW when callers may switch language" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "low", "grade": "B", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 67.6 } ], "editorialScores": { "ergonomics": 64, "maintenance": 50, "payments": 10, "reliability": 95, "schema": 75, "security": 77, "transparency": 64 }, "provenanceScore": 94, "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 aws-sdk-bedrock-runtime" }, "letme": { "capability": "https://letme.dev/voice.agent", "tool": "https://letme.dev/amazon-nova-sonic" }, "sameCompany": [ "amazon-bedrock", "amazon-nova-embeddings", "amazon-bedrock-guardrails", "amazon-transcribe", "amazon-polly", "agentcore-memory", "agentcore-identity", "aws-secrets-manager", "agentcore-web-search", "aws-mcp-servers", "amazon-ses", "amazon-location", "amazon-translate", "amazon-ads-api", "amazon-creators-api" ], "area": "voice", "provenance": { "legalEntity": "Amazon Web Services, Inc.", "domain": "amazon.com", "domainRegistered": "1994-11-01", "domainNote": "The endpoint is on amazonaws.com, an AWS domain registered on 2005-08-18. The security.txt on aws.amazon.com expires on 2027-10-16.", "endpointOnVendorDomain": true, "terms": "https://aws.amazon.com/service-terms/", "privacy": "https://aws.amazon.com/privacy/", "statusPage": "https://health.aws.amazon.com/health/status", "changelog": "https://docs.aws.amazon.com/nova/latest/nova2-userguide/release-notes.html", "securityTxt": "valid", "checked": "2026-11-06", "notes": [ "The AWS Service Terms were last updated on 30 October 2026. Section 50.12 covers Amazon Bedrock, and Bedrock is not among the services section 50.3 lists for use of content to improve AWS services.", "RDAP gives 1994-11-01 for amazon.com and 2005-08-18 for amazonaws.com.", "aws.amazon.com/.well-known/security.txt has Contact, Policy and Encryption fields. Its Expires value is 2027-10-16T16:25:03Z, re-read on 2026-11-01.", "docs.aws.amazon.com/robots.txt allows the Nova and Bedrock pages read. The Nova and Bedrock pricing pages draw their tables by script, so Nova 2 Sonic's prices weren't read." ], "score": 94 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/amazon-nova-sonic.json", "live": { "slug": "amazon-nova-sonic", "versions": [ { "registry": "npm", "name": "@aws-sdk/client-bedrock-runtime", "version": "3.1164.0", "seenAt": "2026-11-06T23:05:35.366071006Z" }, { "registry": "pypi", "name": "aws-sdk-bedrock-runtime", "version": "0.12.0", "released": "2026-10-08", "seenAt": "2026-11-06T23:05:33.518358123Z" } ], "githubStars": 456, "npmWeekly": 21825916, "pypiWeekly": 112826, "securityTxt": { "url": "https://amazon.com/.well-known/security.txt", "state": "valid", "checkedAt": "2026-11-07T16:00:18.354437696Z" }, "llmsTxt": { "url": "https://docs.aws.amazon.com/nova/latest/nova2-userguide/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:31:25.828159373Z" }, "pages": [ { "url": "https://docs.aws.amazon.com/nova/latest/nova2-userguide/release-notes.html", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:05:20.262718007Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "48cb3eb6c070" } ], "updatedAt": "2026-11-07T16:00:18.354437696Z" } }, "answer": "ElevenLabs Agents API + MCP scores 72.6 (BB) on agent readiness against Amazon Nova 2 Sonic's 67.6 (B), and leads in 5 of 7 scored categories. Amazon Nova 2 Sonic leads on reliability.", "b": { "slug": "elevenlabs-agents", "name": "ElevenLabs Agents API + MCP", "vendor": "ElevenLabs", "vendorUrl": "https://elevenlabs.io", "kind": "http-api", "category": "voice-agents", "summary": "ElevenAgents (formerly Conversational AI) runs hosted voice agents as a pipeline of a fine-tuned ElevenLabs ASR model, an LLM of your choice or your own, ElevenLabs TTS and a proprietary turn-taking model.", "url": "https://www.anchorterminal.com/tools/elevenlabs-agents", "markdownUrl": "https://www.anchorterminal.com/tools/elevenlabs-agents.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/elevenlabs-agents.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/elevenlabs-agents.json", "dns": "elevenlabs-agents.grade.anchorterminal.com", "repo": "https://github.com/elevenlabs/packages", "license": "MIT (SDKs)", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.elevenlabs.io/v1/convai", "packages": [ { "registry": "npm", "name": "@elevenlabs/client" }, { "registry": "npm", "name": "@elevenlabs/react" }, { "registry": "pypi", "name": "elevenlabs" } ], "auth": "mixed", "authNotes": "`xi-api-key` header for the management API. Public agents can be joined from a browser with just the agent ID. Private agents need a signed URL or conversation token minted server-side. The hosted MCP at `https://api.elevenlabs.io/v1/mcp` signs in with OAuth.", "pricing": "freemium", "pricingNotes": "Billed per call minute, separate from the credit pool. Free includes 15 minutes, Starter $6 75, Creator $22 275, Pro $99 1,238, Scale $299 3,738 and Business $990 12,375. Extra minutes cost $0.08, burst minutes above the concurrency cap $0.16, and text messages $0.003 each. LLM usage is billed on top at the model's rate, and your telephony provider bills you directly (https://elevenlabs.io/pricing/agents).", "priceSummary": "$22 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 114, "npmWeekly": 1231322, "pypiWeekly": 2223099, "asOf": "2026-09-30" }, "docsUrl": "https://elevenlabs.io/docs/eleven-agents/overview", "llmsTxt": "https://elevenlabs.io/docs/llms.txt", "openapi": "https://api.elevenlabs.io/openapi.json", "registryName": "io.elevenlabs/mcp", "capabilities": [ "voice.agent", "voice.pipeline", "voice.tools", "voice.telephony" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "python", "typescript", "openapi", "llms-txt", "mcp", "pipeline", "webhooks", "enterprise" ], "lastRelease": "2026-10-29", "graded": true, "anchor": { "graded": true, "score": 72.6, "grade": "BB", "agentReady": true, "rank": 121, "ranked": true, "rankOf": 1486, "categoryRank": 2, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 77, "maintenance": 85, "payments": 35, "reliability": 75, "schema": 92, "security": 83, "transparency": 78 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": -3, "negativeNotes": [ "21 September 2026. List conversations and Resolve conversation reference stopped accepting the `missing` operator in `data_collection_params`, announced in that day's changelog with no earlier notice found in the 31 August, 7 September or 14 September entries. A request that worked now fails, with notice only on the day (-3). https://elevenlabs.io/docs/changelog/2026/9/21.md" ], "verdict": "API keys scoped to endpoint groups, with per-key credit limits and service accounts, and a documented prompt-injection guardrail. $0.08 a minute excludes LLM tokens and carrier minutes, and a US database fault on 13 October failed about 45 per cent of US calls for about five hours.", "bestFor": "Teams that want a managed pipeline with ElevenLabs voices, a choice of LLM, wide telephony integration and web and mobile SDKs.", "strengths": [ "API keys scoped to endpoint groups, with per-key credit limits and service accounts", "Hosted MCP server that signs in with OAuth, with EU, India and Singapore endpoints", "Public OpenAPI, llms.txt and an errors page with codes, fixes and request IDs", "A Manipulation guardrail that detects prompt injection and can end the call, at no extra cost", "Weekly changelog entries and SDKs for Python, JavaScript and mobile" ], "weaknesses": [ "$0.08 a minute excludes LLM tokens and carrier minutes", "About 45 per cent of US calls failed for about five hours on 13 October 2026", "Conversation data kept 2 years by default", "Audit logs and HIPAA BAAs only on Enterprise", "No SLA on self-serve plans" ], "agentNotes": [ "Create a key scoped to the agents endpoints with a credit limit before handing it to an agent", "Back off exponentially on `rate_limit_exceeded`, and wait for calls to finish on `concurrent_limit_exceeded`", "Use signed URLs or conversation tokens for private agents instead of exposing the API key", "Turn on the Manipulation guardrail and set MCP tools to Always Ask for agents that take actions", "Set `platform_settings.privacy.retention_days` where you don't need 2 years of history" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 72.6 } ], "editorialScores": { "ergonomics": 77, "maintenance": 85, "payments": 35, "reliability": 75, "schema": 92, "security": 83, "transparency": 65 }, "provenanceScore": 91, "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://api.elevenlabs.io/v1/convai/agents/create -H \"xi-api-key: $ELEVENLABS_API_KEY\" \\\n -H \"content-type: application/json\" \\\n -d '{\"conversation_config\":{\"agent\":{\"first_message\":\"Hi, how can I help?\",\"prompt\":{\"prompt\":\"You take restaurant bookings.\"}}}}'", "claudeCode": "claude mcp add --transport http elevenlabs https://api.elevenlabs.io/v1/mcp" }, "letme": { "capability": "https://letme.dev/voice.agent", "tool": "https://letme.dev/elevenlabs-agents" }, "sameCompany": [ "elevenlabs-music", "elevenlabs-scribe", "elevenlabs-tts", "elevenlabs-voice-cloning" ], "area": "voice", "unitPrices": [ { "item": "Agent call", "unit": "call-minute", "usd": 0.08, "note": "platform fee only, LLM and carrier extra" }, { "item": "Burst call above concurrency", "unit": "call-minute", "usd": 0.16 }, { "item": "Text message", "unit": "message", "usd": 0.003 }, { "item": "Creator plan", "unit": "month", "usd": 22, "note": "275 call minutes, 10 concurrent calls" }, { "item": "Pro plan", "unit": "month", "usd": 99, "note": "1,238 call minutes, 20 concurrent calls" } ], "provenance": { "legalEntity": "Eleven Labs Inc.", "domain": "elevenlabs.io", "domainRegistered": "2021-12-15", "endpointOnVendorDomain": true, "terms": "https://elevenlabs.io/terms-of-use", "privacy": "https://elevenlabs.io/privacy-policy", "statusPage": "https://status.elevenlabs.io", "changelog": "https://elevenlabs.io/docs/changelog", "securityTxt": "valid", "checked": "2026-11-01", "score": 91 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/elevenlabs-agents.json", "live": { "slug": "elevenlabs-agents", "probe": { "target": "https://api.elevenlabs.io/v1/convai", "method": "get", "lastAt": "2026-11-07T18:20:22.797497431Z", "lastOk": true, "lastStatus": 404, "lastMs": 257, "authRequired": false, "uptime24h": 100, "uptime30d": 99.99, "p50ms24h": 150, "p95ms24h": 411, "samples24h": 239, "samples30d": 7910, "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": 248 }, { "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": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://status.elevenlabs.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:21:04.70728828Z" }, "versions": [ { "registry": "github", "name": "elevenlabs/packages", "version": "@elevenlabs/convai-widget-core@0.25.1", "released": "2026-11-06", "seenAt": "2026-11-06T23:23:36.51887295Z" }, { "registry": "npm", "name": "@elevenlabs/client", "version": "1.35.0", "seenAt": "2026-11-06T23:23:34.130862536Z" }, { "registry": "npm", "name": "@elevenlabs/react", "version": "1.21.1", "seenAt": "2026-11-06T23:23:34.400811298Z" }, { "registry": "pypi", "name": "elevenlabs", "version": "2.77.0", "released": "2026-11-06", "seenAt": "2026-11-06T23:23:36.339940081Z" } ], "githubStars": 118, "npmWeekly": 1735262, "pypiWeekly": 2780548, "securityTxt": { "url": "https://elevenlabs.io/.well-known/security.txt", "state": "valid", "expires": "2027-10-06T00:00:00.000Z", "checkedAt": "2026-11-07T16:01:30.458873656Z" }, "llmsTxt": { "url": "https://elevenlabs.io/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:20.983173674Z" }, "domain": { "domain": "elevenlabs.io", "checkedAt": "2026-11-01T14:12:37.895521288Z" }, "pages": [ { "url": "https://elevenlabs.io/docs/changelog", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:09:08.737811817Z", "changedAt": "2026-11-05T12:32:47.899842069Z", "fingerprint": "9a5d8291a1ec" }, { "url": "https://elevenlabs.io/docs/changelog/2026/10/26.md", "kind": "deprecations", "status": 200, "checkedAt": "2026-11-07T14:09:12.294214855Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fad8478e3fa2" }, { "url": "https://elevenlabs.io/pricing/agents", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:09:16.771542232Z", "changedAt": "2026-11-07T14:09:16.771542232Z", "fingerprint": "003b322bf7de" }, { "url": "https://elevenlabs.io/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:09:20.769219928Z", "changedAt": "2026-10-21T00:26:57.094235957Z", "fingerprint": "07efd362bdff" }, { "url": "https://elevenlabs.io/terms-of-use", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:09:22.771060048Z", "changedAt": "2026-10-13T20:16:41.591694515Z", "fingerprint": "c166f437bb16" } ], "mcpTools": { "url": "https://api.elevenlabs.io/v1/mcp", "checkedAt": "2026-11-07T01:44:07.40682167Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:44:07.40682167Z" }, "github": { "repo": "elevenlabs/packages", "checkedAt": "2026-11-02T08:46:16.272559354Z", "stars": 116, "archived": false, "issuesEnabled": true, "pushedAt": "2026-11-02T08:24:59Z", "openIssues": 70, "openPRs": 58, "issuesOpened90d": 26, "issuesClosed90d": 11, "prsMerged90d": 115, "ci": { "branch": "main", "runs": 50, "success": 49, "failure": 1, "other": 0, "latest": "success", "latestAt": "2026-10-30T13:16:05Z" }, "replies": { "sampled": 25, "unanswered": 14, "medianDays": 3.3 } }, "updatedAt": "2026-11-07T18:20:22.797497431Z" } }, "edges": [ { "by": 35, "category": "maintenance", "leads": "elevenlabs-agents", "name": "Maintenance \u0026 community", "reasons": { "a": "Read as a model. The newest dated change is the May 2026 refresh, completed on 28 May, 162 days before this check (10). No Sonic release note or document history entry in the 90 days from 8 August. The pre-alpha Python SDK shipped 0.9.0, 0.10.0, 0.11.0 and 0.12.0 in the window, counted half (10 of 20). Release notes, document history, re:Post and AWS Support (10 of 15). The JavaScript Bedrock runtime client is current at 3.1163.0, while the Python route is pre-alpha (10 of 15). The SDKs ship on AWS's release train; CI not read (10). Total 50.", "b": "Changelog entry on 26 October 2026, and @elevenlabs/client 1.32.1 and @elevenlabs/react 1.20.2 tagged on 29 October (30). Weekly entries, with 108 tags in the agents packages repository since 3 August (20). Weekly changelog and incident write-ups on the status page, support we didn't test (12 of 15 for a closed service). Python and JavaScript SDKs with over a million weekly downloads each per the 1 October check, plus mobile SDKs (15). MIT SDKs on GitHub (8 of 10). 30 + 20 + 12 + 15 + 8 = 85." }, "scores": { "a": 50, "b": 85 } }, { "by": 25, "category": "payments", "leads": "elevenlabs-agents", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0). The Nova and Bedrock pricing pages carry a speech-to-speech table drawn by script, so the per-token prices weren't read and this line scores absent, which is our reader's limit and not the vendor's (0). New accounts get up to $200 in Free Tier credits, and the Free Tier FAQ says most new customers need no payment method, read as half on the other AWS listings (10). A person signs up for an AWS account in a browser (0). Total 10.", "b": "No x402, MPP or L402 (0 of 40). The $0.08 call minute, $0.16 burst minute and plan allowances are on the public pricing page, and LLM usage is billed at the listed model rate (20). The Free plan includes 15 call minutes, and we didn't confirm whether it needs a card (15 of 20). Access starts with a human signup, and the MCP server's OAuth also needs a person to sign in (0)." }, "scores": { "a": 10, "b": 35 } }, { "by": 20, "category": "reliability", "leads": "amazon-nova-sonic", "name": "Reliability", "reasons": { "a": "Hosted reading. AWS Health Dashboard with per-service, per-Region history (20). The dashboard history file (newest event 30 October 2026) lists no Bedrock event in the 90 days from 8 August, and the 3 September us-west-2 event names STS, Connect and IAM Identity Center, not Bedrock. The public dashboard records broad events only, so 25 of 30, as amazon-nova-embeddings was read. Quotas published, 20 concurrent requests per Region, not adjustable (15). The stream API lists `ThrottlingException` (429), `ServiceUnavailableException` (503), `ModelTimeoutException` (408) and `ModelStreamErrorException` (424), Bedrock's troubleshooting guide advises backoff with jitter, and the 8-minute connection limit comes with a session-continuation sample (15). Bedrock's SLA of 99.9 per cent a month per Region for model APIs, as read for amazon-nova-embeddings on 1 November (10). Generally available since 2 December 2025 (10). 20 + 25 + 15 + 15 + 10 + 10 = 95.", "b": "Read as a hosted service. Status page at status.elevenlabs.io (incident.io) with an ElevenAgents component group (Conversations, Telephony, Integrations, Other Agents APIs, Quality, RAG, UI) and dated component history (20). Re-read on 1 November from the history page, which dates each component's impact, as the ElevenLabs text-to-speech and voice cloning listings were read; the incidents feed was re-posted on 21 October and leaves older incidents out. In the 90 days from 3 August, ten incidents touched Agents components, all partial or under an hour. The longest, from 08:50 UTC on 13 October, a database behind the Agents platform in the US stalled, and the write-up says roughly 45 per cent of US calls failed and 7 per cent of API requests returned errors until 14:18 UTC, on seven Agents components marked partial outage. That is a share of requests in one region, read as partial, as hubspot-mcp's \"many customers in North America\" was and as the ElevenLabs text-to-speech and voice cloning listings read this incident, not every user in a region as in google-drive-api's regional major. The others are Inbound Twilio calls on 18 August (under 1 per cent), EU batch calling delays on 27 August, EU conversation history on 10 September, some calls failing to start on 18 and 19 September (1 hour 25 minutes), the EU platform unresponsive from 13:40 to 14:18 UTC on 28 September (38 minutes, one region), a usage datastore fault from 15:56 to 19:36 UTC on 29 September that caused latency and some failed requests on Agents conversations, STT and Creative products (partial outage), EU SIP calls with static IPs from 9:53 to 12:06 UTC on 6 October (one region, one call path) and SIP conversations from 14:21 to 15:15 UTC on 8 October. Minor only (20 of 30, was 5). Concurrency per plan is published, from 4 calls on Free to 40 on Business with burst to three times the cap (15). The errors page returns 429 with `rate_limit_exceeded`, `concurrent_limit_exceeded` or `system_busy` and tells callers to back off exponentially. No Retry-After header and no idempotency keys found (10 of 15). No SLA found for a self-serve tier, and Enterprise lists custom terms around SLAs (0). Agents is generally available (10). 20 + 20 + 15 + 10 + 0 + 10 = 75." }, "scores": { "a": 95, "b": 75 } }, { "by": 17, "category": "schema", "leads": "elevenlabs-agents", "name": "Schema \u0026 documentation", "reasons": { "a": "The Bedrock service model types `InvokeModelWithBidirectionalStream`, but the Sonic events inside it (session, prompt, content, tool and usage events) are JSON payloads documented only in the guide, with no schema file (12 of 25). llms.txt and Markdown copies of the Nova 2 guide (10). Guides on the event lifecycle, barge-in, turn-taking, async tools and chat history say when and how to use each (16 of 20). Event fields are documented as JSON examples and tables, not typed schemas (10 of 15). Sample repositories in several languages and the API's exceptions with HTTP codes (12 of 15). Release notes and document history, with in-place model refreshes and a versioned model ID (15). Total 75.", "b": "Public OpenAPI at api.elevenlabs.io/openapi.json (25). llms.txt with Markdown copies of each page (10). The docs explain each agent setting with guidance on when to use it, such as turn timeout and soft-timeout fillers (16 of 20). The OpenAPI types every field, but `conversation_config` is a large nested object (12 of 15). The errors page lists codes, types and fixes, and every error carries a `request_id` (14 of 15). Weekly dated changelog entries and a versioned API (15)." }, "scores": { "a": 75, "b": 92 } }, { "by": 13, "category": "ergonomics", "leads": "elevenlabs-agents", "name": "Agent ergonomics", "reasons": { "a": "Scored as an API. Responses carry transcripts of both sides and usage events, chat history is capped at 200 KB and can be injected once per session (15 of 25). Output controls are voice, turn-taking sensitivity and text or audio input (12 of 20). Typed exceptions with HTTP codes, while errors inside the event stream are less documented (15 of 20). Asynchronous tool calls let the model keep talking, and AWS samples show how to resume after the 8-minute limit, with nothing on repeating tool side effects after a reconnect (12 of 20). A session needs a sequence of start events before audio. The JavaScript SDK is current, but the Python SDK the quickstart uses is pre-alpha and needs Python 3.12 (10 of 15). Total 64.", "b": "We couldn't count the hosted MCP server's tools, since the docs list about ten capabilities without a tool list, so we scored context cost on the API, where list endpoints take page sizes and cursors (18 of 25). Conversation lists page and filter (18 of 20). Typed error codes with suggested fixes (18 of 20). MCP clients can set each tool to ask first and the docs warn that deleting an agent is destructive, but we found no idempotency keys (8 of 20). Few required fields to create an agent and official SDKs for Python, JavaScript, React, Swift, Kotlin and Flutter (15)." }, "scores": { "a": 64, "b": 77 } }, { "by": 6, "category": "security", "leads": "elevenlabs-agents", "name": "Security \u0026 auth", "reasons": { "a": "SigV4 with IAM roles and temporary credentials scoped per model ARN, as the Sonic quickstart signs (30). Tools run in the client, so side effects are the developer's to approve, and IAM can restrict which models a role invokes, with no approval step in the API (12 of 20). The model listens to callers and acts on tool results, and no prompt-injection guidance was found in the Sonic guide (5 of 15). CloudTrail logs Bedrock API calls, read as amazon-nova-embeddings was (12 of 15). VDP on HackerOne, Bedrock in SOC scope and a valid security.txt on aws.amazon.com, with no paid bounty, as on the other AWS listings (18 of 20). Total 77.", "b": "The hosted MCP server signs in with OAuth and asks for scoped access to agents and speech. API keys can be limited to endpoint groups, given a credit limit, owned by a service account, rotated, and are disabled if found on GitHub (30). Scoped keys and signed URLs for private agents keep the main key off clients (17 of 20). Agents pass caller speech to an LLM. The guardrails docs, generally available since 19 October 2026, describe a Manipulation guardrail that detects prompt injection in user turns and can end the conversation, included at no extra cost, and the MCP security page recommends Always Ask approval for tool calls. It is a setting the builder turns on, not a default we could confirm (12 of 15, was 5). Audit logs cover over 100 endpoints through `GET /v1/workspace/audit-logs`, but only on Enterprise, and every conversation keeps a transcript (12 of 15). security.txt valid to 6 October 2027 (re-read on 1 November) and HIPAA BAAs are available with zero retention mode. We didn't re-check certifications or a bug bounty (12 of 20). 30 + 17 + 12 + 12 + 12 = 83." }, "scores": { "a": 77, "b": 83 } } ], "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Amazon Web Services", "b": "ElevenLabs", "name": "Vendor" }, { "a": "no (local only)", "b": "https://api.elevenlabs.io/v1/convai", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Pay per use", "b": "Freemium", "name": "Pricing" }, { "a": "not published", "b": "$0.08 per minute of call", "name": "Price for voice agents" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "MIT (SDKs)", "name": "Licence" }, { "a": "0", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "io.elevenlabs/mcp", "name": "MCP registry" }, { "a": "2026-05-28", "b": "2026-10-29", "name": "Last release" }, { "a": "2026-10-01", "b": "2026-03-31", "name": "Terms last updated" }, { "a": "2026-05-18", "b": "2026-05-20", "name": "Privacy policy last updated" }, { "a": "yes, with an opt-out", "b": "yes, with an opt-out", "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": "none", "b": "114 stars, 1.2M npm/wk, 2.2M PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.5/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "ElevenLabs Agents API + MCP scores 72.6 (BB) on agent readiness against Amazon Nova 2 Sonic's 67.6 (B), and leads in 5 of 7 scored categories. Amazon Nova 2 Sonic leads on reliability.", "question": "Which is better for AI agents, Amazon Nova 2 Sonic or ElevenLabs Agents API + MCP?" }, { "answer": "Amazon Nova 2 Sonic needs an API key. ElevenLabs Agents API + MCP takes an API key or an OAuth sign-in.", "question": "Do Amazon Nova 2 Sonic and ElevenLabs Agents API + MCP need an API key?" }, { "answer": "No hosted endpoint is listed for Amazon Nova 2 Sonic. ElevenLabs Agents API + MCP has a hosted endpoint at https://api.elevenlabs.io/v1/convai.", "question": "Can an agent call Amazon Nova 2 Sonic and ElevenLabs Agents API + MCP without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 95 against 75" ], "also": [ "No incidents deducted, where ElevenLabs Agents API + MCP loses 3 points for them" ], "goodFor": "Voice agents on AWS, call centres on Amazon Connect, teams that want IAM and in-account data handling.", "slug": "amazon-nova-sonic", "watchFor": "Connections end after 8 minutes, so long calls need the session-continuation pattern" }, { "aheadOn": [ "Schema \u0026 documentation, 92 against 75", "Agent ergonomics, 77 against 64", "Security \u0026 auth, 83 against 77", "Payments \u0026 pricing, 35 against 10", "Maintenance \u0026 community, 85 against 50" ], "also": [ "Agent-ready, a grade of BB or better", "A hosted endpoint, with nothing to install" ], "goodFor": "Teams that want a managed pipeline with ElevenLabs voices, a choice of LLM, wide telephony integration and web and mobile SDKs.", "slug": "elevenlabs-agents", "watchFor": "$0.08 a minute excludes LLM tokens and carrier minutes" } ], "history": { "amazon-nova-sonic": null, "elevenlabs-agents": [ { "causes": [ "evidence", "event" ], "date": "2026-11-01", "delta": 1.2, "from": 71.4, "fromGrade": "BB", "to": 72.6, "toGrade": "BB" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.1, "from": 71.3, "fromGrade": "BB", "to": 71.4, "toGrade": "BB" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.2, "from": 71.5, "fromGrade": "BB", "to": 71.3, "toGrade": "BB" } ] }, "job": { "capability": "voice.agent", "name": "Voice agents" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-assemblyai-voice-agent.json", "title": "Amazon Nova 2 Sonic vs AssemblyAI Voice Agent API", "url": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-assemblyai-voice-agent" }, { "json": 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"ElevenLabs Agents API + MCP vs Ultravox Realtime API", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vaani-voice.json", "title": "ElevenLabs Agents API + MCP vs Vaani Developer Platform", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vaani-voice" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vapi.json", "title": "ElevenLabs Agents API + MCP vs Vapi API + MCP", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vapi" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vocily.json", "title": "ElevenLabs Agents API + MCP vs Vocily AI", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vocily" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent.json", "title": "ElevenLabs Agents API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/cuelight-vs-elevenlabs-agents.json", "title": "CueLight vs ElevenLabs Agents API + MCP", "url": "https://www.anchorterminal.com/compare/cuelight-vs-elevenlabs-agents" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-pipecat-phonellm.json", "title": "ElevenLabs Agents API + MCP vs Pipecat PhoneLLM", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-pipecat-phonellm" }, { "json": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-pipecat-phonellm.json", "title": "Amazon Nova 2 Sonic vs Pipecat PhoneLLM", "url": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-pipecat-phonellm" } ], "panel": null, "scores": [ { "amazon-nova-sonic": 95, "by": 20, "edge": "amazon-nova-sonic", "elevenlabs-agents": 75, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "amazon-nova-sonic": 75, "by": 17, "edge": "elevenlabs-agents", "elevenlabs-agents": 92, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "amazon-nova-sonic": 64, "by": 13, "edge": "elevenlabs-agents", "elevenlabs-agents": 77, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "amazon-nova-sonic": 77, "by": 6, "edge": "elevenlabs-agents", "elevenlabs-agents": 83, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "amazon-nova-sonic": 10, "by": 25, "edge": "elevenlabs-agents", "elevenlabs-agents": 35, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "amazon-nova-sonic": 50, "by": 35, "edge": "elevenlabs-agents", "elevenlabs-agents": 85, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "amazon-nova-sonic": 79, "by": 1, "edge": "amazon-nova-sonic", "elevenlabs-agents": 78, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "ElevenLabs Agents API + MCP scores 72.6 (BB) on agent readiness against Amazon Nova 2 Sonic's 67.6 (B), and leads in 5 of 7 scored categories. Amazon Nova 2 Sonic leads on reliability. Both do voice agents.", "tasks": null, "tutorials": [], "verdicts": { "amazon-nova-sonic": "Nova 2 Sonic runs speech-to-speech conversations with asynchronous tools on Bedrock, with IAM scoping, no default storage of inputs and a 99.9 per cent SLA. Sessions cut off at 8 minutes, the Python SDK is pre-alpha, and the event payloads have no schema file. Prices are in a script-drawn table we couldn't read.", "elevenlabs-agents": "API keys scoped to endpoint groups, with per-key credit limits and service accounts, and a documented prompt-injection guardrail. $0.08 a minute excludes LLM tokens and carrier minutes, and a US database fault on 13 October failed about 45 per cent of US calls for about five hours." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents", "json": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents.min.md" }, "markdown": "ElevenLabs Agents API + MCP scores 72.6 (BB) on agent readiness against Amazon Nova 2 Sonic's 67.6 (B), and leads in 5 of 7 scored categories. Amazon Nova 2 Sonic leads on reliability. Both do voice agents.\n\n- Amazon Nova 2 Sonic: grade B, 67.6/100, rank #314 of 1486. Markdown https://www.anchorterminal.com/tools/amazon-nova-sonic.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-nova-sonic.json\n- ElevenLabs Agents API + MCP: grade BB, 72.6/100, rank #121 of 1486. Markdown https://www.anchorterminal.com/tools/elevenlabs-agents.md · JSON https://www.anchorterminal.com/api/v1/tools/elevenlabs-agents.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 518 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### Amazon Nova 2 Sonic (B)\n\nGood for: Voice agents on AWS, call centres on Amazon Connect, teams that want IAM and in-account data handling.\n\nAhead on:\n- Reliability, 95 against 75\n\nAlso in its favour:\n- No incidents deducted, where ElevenLabs Agents API + MCP loses 3 points for them\n\nWatch for: Connections end after 8 minutes, so long calls need the session-continuation pattern\n\n### ElevenLabs Agents API + MCP (BB)\n\nGood for: Teams that want a managed pipeline with ElevenLabs voices, a choice of LLM, wide telephony integration and web and mobile SDKs.\n\nAhead on:\n- Schema \u0026 documentation, 92 against 75\n- Agent ergonomics, 77 against 64\n- Security \u0026 auth, 83 against 77\n- Payments \u0026 pricing, 35 against 10\n- Maintenance \u0026 community, 85 against 50\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- A hosted endpoint, with nothing to install\n\nWatch for: $0.08 a minute excludes LLM tokens and carrier minutes\n\n\n## Why the edge\n\n### Maintenance \u0026 community: ElevenLabs Agents API + MCP +35\n\n- Amazon Nova 2 Sonic (50): Read as a model. The newest dated change is the May 2026 refresh, completed on 28 May, 162 days before this check (10). No Sonic release note or document history entry in the 90 days from 8 August. The pre-alpha Python SDK shipped 0.9.0, 0.10.0, 0.11.0 and 0.12.0 in the window, counted half (10 of 20). Release notes, document history, re:Post and AWS Support (10 of 15). The JavaScript Bedrock runtime client is current at 3.1163.0, while the Python route is pre-alpha (10 of 15). The SDKs ship on AWS's release train; CI not read (10). Total 50.\n- ElevenLabs Agents API + MCP (85): Changelog entry on 26 October 2026, and @elevenlabs/client 1.32.1 and @elevenlabs/react 1.20.2 tagged on 29 October (30). Weekly entries, with 108 tags in the agents packages repository since 3 August (20). Weekly changelog and incident write-ups on the status page, support we didn't test (12 of 15 for a closed service). Python and JavaScript SDKs with over a million weekly downloads each per the 1 October check, plus mobile SDKs (15). MIT SDKs on GitHub (8 of 10). 30 + 20 + 12 + 15 + 8 = 85.\n\n### Payments \u0026 pricing: ElevenLabs Agents API + MCP +25\n\n- Amazon Nova 2 Sonic (10): No x402, MPP or L402 (0). The Nova and Bedrock pricing pages carry a speech-to-speech table drawn by script, so the per-token prices weren't read and this line scores absent, which is our reader's limit and not the vendor's (0). New accounts get up to $200 in Free Tier credits, and the Free Tier FAQ says most new customers need no payment method, read as half on the other AWS listings (10). A person signs up for an AWS account in a browser (0). Total 10.\n- ElevenLabs Agents API + MCP (35): No x402, MPP or L402 (0 of 40). The $0.08 call minute, $0.16 burst minute and plan allowances are on the public pricing page, and LLM usage is billed at the listed model rate (20). The Free plan includes 15 call minutes, and we didn't confirm whether it needs a card (15 of 20). Access starts with a human signup, and the MCP server's OAuth also needs a person to sign in (0).\n\n### Reliability: Amazon Nova 2 Sonic +20\n\n- Amazon Nova 2 Sonic (95): Hosted reading. AWS Health Dashboard with per-service, per-Region history (20). The dashboard history file (newest event 30 October 2026) lists no Bedrock event in the 90 days from 8 August, and the 3 September us-west-2 event names STS, Connect and IAM Identity Center, not Bedrock. The public dashboard records broad events only, so 25 of 30, as amazon-nova-embeddings was read. Quotas published, 20 concurrent requests per Region, not adjustable (15). The stream API lists `ThrottlingException` (429), `ServiceUnavailableException` (503), `ModelTimeoutException` (408) and `ModelStreamErrorException` (424), Bedrock's troubleshooting guide advises backoff with jitter, and the 8-minute connection limit comes with a session-continuation sample (15). Bedrock's SLA of 99.9 per cent a month per Region for model APIs, as read for amazon-nova-embeddings on 1 November (10). Generally available since 2 December 2025 (10). 20 + 25 + 15 + 15 + 10 + 10 = 95.\n- ElevenLabs Agents API + MCP (75): Read as a hosted service. Status page at status.elevenlabs.io (incident.io) with an ElevenAgents component group (Conversations, Telephony, Integrations, Other Agents APIs, Quality, RAG, UI) and dated component history (20). Re-read on 1 November from the history page, which dates each component's impact, as the ElevenLabs text-to-speech and voice cloning listings were read; the incidents feed was re-posted on 21 October and leaves older incidents out. In the 90 days from 3 August, ten incidents touched Agents components, all partial or under an hour. The longest, from 08:50 UTC on 13 October, a database behind the Agents platform in the US stalled, and the write-up says roughly 45 per cent of US calls failed and 7 per cent of API requests returned errors until 14:18 UTC, on seven Agents components marked partial outage. That is a share of requests in one region, read as partial, as hubspot-mcp's \"many customers in North America\" was and as the ElevenLabs text-to-speech and voice cloning listings read this incident, not every user in a region as in google-drive-api's regional major. The others are Inbound Twilio calls on 18 August (under 1 per cent), EU batch calling delays on 27 August, EU conversation history on 10 September, some calls failing to start on 18 and 19 September (1 hour 25 minutes), the EU platform unresponsive from 13:40 to 14:18 UTC on 28 September (38 minutes, one region), a usage datastore fault from 15:56 to 19:36 UTC on 29 September that caused latency and some failed requests on Agents conversations, STT and Creative products (partial outage), EU SIP calls with static IPs from 9:53 to 12:06 UTC on 6 October (one region, one call path) and SIP conversations from 14:21 to 15:15 UTC on 8 October. Minor only (20 of 30, was 5). Concurrency per plan is published, from 4 calls on Free to 40 on Business with burst to three times the cap (15). The errors page returns 429 with `rate_limit_exceeded`, `concurrent_limit_exceeded` or `system_busy` and tells callers to back off exponentially. No Retry-After header and no idempotency keys found (10 of 15). No SLA found for a self-serve tier, and Enterprise lists custom terms around SLAs (0). Agents is generally available (10). 20 + 20 + 15 + 10 + 0 + 10 = 75.\n\n### Schema \u0026 documentation: ElevenLabs Agents API + MCP +17\n\n- Amazon Nova 2 Sonic (75): The Bedrock service model types `InvokeModelWithBidirectionalStream`, but the Sonic events inside it (session, prompt, content, tool and usage events) are JSON payloads documented only in the guide, with no schema file (12 of 25). llms.txt and Markdown copies of the Nova 2 guide (10). Guides on the event lifecycle, barge-in, turn-taking, async tools and chat history say when and how to use each (16 of 20). Event fields are documented as JSON examples and tables, not typed schemas (10 of 15). Sample repositories in several languages and the API's exceptions with HTTP codes (12 of 15). Release notes and document history, with in-place model refreshes and a versioned model ID (15). Total 75.\n- ElevenLabs Agents API + MCP (92): Public OpenAPI at api.elevenlabs.io/openapi.json (25). llms.txt with Markdown copies of each page (10). The docs explain each agent setting with guidance on when to use it, such as turn timeout and soft-timeout fillers (16 of 20). The OpenAPI types every field, but `conversation_config` is a large nested object (12 of 15). The errors page lists codes, types and fixes, and every error carries a `request_id` (14 of 15). Weekly dated changelog entries and a versioned API (15).\n\n### Agent ergonomics: ElevenLabs Agents API + MCP +13\n\n- Amazon Nova 2 Sonic (64): Scored as an API. Responses carry transcripts of both sides and usage events, chat history is capped at 200 KB and can be injected once per session (15 of 25). Output controls are voice, turn-taking sensitivity and text or audio input (12 of 20). Typed exceptions with HTTP codes, while errors inside the event stream are less documented (15 of 20). Asynchronous tool calls let the model keep talking, and AWS samples show how to resume after the 8-minute limit, with nothing on repeating tool side effects after a reconnect (12 of 20). A session needs a sequence of start events before audio. The JavaScript SDK is current, but the Python SDK the quickstart uses is pre-alpha and needs Python 3.12 (10 of 15). Total 64.\n- ElevenLabs Agents API + MCP (77): We couldn't count the hosted MCP server's tools, since the docs list about ten capabilities without a tool list, so we scored context cost on the API, where list endpoints take page sizes and cursors (18 of 25). Conversation lists page and filter (18 of 20). Typed error codes with suggested fixes (18 of 20). MCP clients can set each tool to ask first and the docs warn that deleting an agent is destructive, but we found no idempotency keys (8 of 20). Few required fields to create an agent and official SDKs for Python, JavaScript, React, Swift, Kotlin and Flutter (15).\n\n### Security \u0026 auth: ElevenLabs Agents API + MCP +6\n\n- Amazon Nova 2 Sonic (77): SigV4 with IAM roles and temporary credentials scoped per model ARN, as the Sonic quickstart signs (30). Tools run in the client, so side effects are the developer's to approve, and IAM can restrict which models a role invokes, with no approval step in the API (12 of 20). The model listens to callers and acts on tool results, and no prompt-injection guidance was found in the Sonic guide (5 of 15). CloudTrail logs Bedrock API calls, read as amazon-nova-embeddings was (12 of 15). VDP on HackerOne, Bedrock in SOC scope and a valid security.txt on aws.amazon.com, with no paid bounty, as on the other AWS listings (18 of 20). Total 77.\n- ElevenLabs Agents API + MCP (83): The hosted MCP server signs in with OAuth and asks for scoped access to agents and speech. API keys can be limited to endpoint groups, given a credit limit, owned by a service account, rotated, and are disabled if found on GitHub (30). Scoped keys and signed URLs for private agents keep the main key off clients (17 of 20). Agents pass caller speech to an LLM. The guardrails docs, generally available since 19 October 2026, describe a Manipulation guardrail that detects prompt injection in user turns and can end the conversation, included at no extra cost, and the MCP security page recommends Always Ask approval for tool calls. It is a setting the builder turns on, not a default we could confirm (12 of 15, was 5). Audit logs cover over 100 endpoints through `GET /v1/workspace/audit-logs`, but only on Enterprise, and every conversation keeps a transcript (12 of 15). security.txt valid to 6 October 2027 (re-read on 1 November) and HIPAA BAAs are available with zero retention mode. We didn't re-check certifications or a bug bounty (12 of 20). 30 + 17 + 12 + 12 + 12 = 83.\n\n## Score by category\n\n| Category | Weight | Amazon Nova 2 Sonic | ElevenLabs Agents API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 95 | 75 | Amazon Nova 2 Sonic +20 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 75 | 92 | ElevenLabs Agents API + MCP +17 |\n| Agent ergonomics | 13% (16.2 this run) | 64 | 77 | ElevenLabs Agents API + MCP +13 |\n| Security \u0026 auth | 14% (17.5 this run) | 77 | 83 | ElevenLabs Agents API + MCP +6 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 10 | 35 | ElevenLabs Agents API + MCP +25 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 50 | 85 | ElevenLabs Agents API + MCP +35 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 79 | 78 | Amazon Nova 2 Sonic +1 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **67.6 · B** | **72.6 · BB** | |\n\n## Facts side by side\n\n| Fact | Amazon Nova 2 Sonic | ElevenLabs Agents API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Amazon Web Services | ElevenLabs |\n| Hosted endpoint | no (local only) | `https://api.elevenlabs.io/v1/convai` |\n| Transports | HTTP | HTTP, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Freemium |\n| Price for voice agents | not published | $0.08 per minute of call |\n| x402 | no | no |\n| Licence | none | MIT (SDKs) |\n| Tools exposed | 0 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `io.elevenlabs/mcp` |\n| Last release | 2026-05-28 | 2026-10-29 |\n| Terms last updated | 2026-10-01 | 2026-03-31 |\n| Privacy policy last updated | 2026-05-18 | 2026-05-20 |\n| Customer content may train models | yes, with an opt-out | yes, with an opt-out |\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 | none | 114 stars, 1.2M npm/wk, 2.2M PyPI/wk |\n| Agent reviews | none | 3.5/5 (2) |\n\n## How the scores have moved\n\n### Amazon Nova 2 Sonic\n\nNo score change since it was listed.\n\n### ElevenLabs Agents API + MCP\n\n- +1.2 on 1 November 2026: new evidence, negative event\n- +0.1 on 27 October 2026: checklist\n- -0.2 on 8 October 2026: checklist\n\n## Verdicts\n\n**Amazon Nova 2 Sonic.** Nova 2 Sonic runs speech-to-speech conversations with asynchronous tools on Bedrock, with IAM scoping, no default storage of inputs and a 99.9 per cent SLA. Sessions cut off at 8 minutes, the Python SDK is pre-alpha, and the event payloads have no schema file. Prices are in a script-drawn table we couldn't read.\n\n**ElevenLabs Agents API + MCP.** API keys scoped to endpoint groups, with per-key credit limits and service accounts, and a documented prompt-injection guardrail. $0.08 a minute excludes LLM tokens and carrier minutes, and a US database fault on 13 October failed about 45 per cent of US calls for about five hours.\n\n## Before you call either\n\n### Amazon Nova 2 Sonic\n\n1. Plan a reconnect before 8 minutes and replay chat history (up to 200 KB) at the start of the new session\n2. Send session, prompt and content start events in order before any audio\n3. Make tool calls safe to repeat, since a reconnect can replay them\n4. Back off on `ThrottlingException` and stay within 20 concurrent sessions per Region\n5. Use the polyglot voices TIFFANY or MATTHEW when callers may switch language\n\n### ElevenLabs Agents API + MCP\n\n1. Create a key scoped to the agents endpoints with a credit limit before handing it to an agent\n2. Back off exponentially on `rate_limit_exceeded`, and wait for calls to finish on `concurrent_limit_exceeded`\n3. Use signed URLs or conversation tokens for private agents instead of exposing the API key\n4. Turn on the Manipulation guardrail and set MCP tools to Always Ask for agents that take actions\n5. Set `platform_settings.privacy.retention_days` where you don't need 2 years of history\n\n## Questions\n\n### Which is better for AI agents, Amazon Nova 2 Sonic or ElevenLabs Agents API + MCP?\n\nElevenLabs Agents API + MCP scores 72.6 (BB) on agent readiness against Amazon Nova 2 Sonic's 67.6 (B), and leads in 5 of 7 scored categories. Amazon Nova 2 Sonic leads on reliability.\n\n### Do Amazon Nova 2 Sonic and ElevenLabs Agents API + MCP need an API key?\n\nAmazon Nova 2 Sonic needs an API key. ElevenLabs Agents API + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call Amazon Nova 2 Sonic and ElevenLabs Agents API + MCP without installing anything?\n\nNo hosted endpoint is listed for Amazon Nova 2 Sonic. ElevenLabs Agents API + MCP has a hosted endpoint at https://api.elevenlabs.io/v1/convai.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents.json, and with the fewest tokens: https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-elevenlabs-agents.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"amazon-nova-sonic\", \"b\": \"elevenlabs-agents\"}`. From a terminal: `anchor compare amazon-nova-sonic elevenlabs-agents`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/amazon-nova-sonic.json and https://www.anchorterminal.com/api/v1/tools/elevenlabs-agents.json\n\n## Other comparisons with Amazon Nova 2 Sonic or ElevenLabs Agents API + MCP\n\n- [Amazon Nova 2 Sonic vs AssemblyAI Voice Agent API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-assemblyai-voice-agent.md)\n- [Amazon Nova 2 Sonic vs Bland AI API + MCP](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-bland-ai.md)\n- [Amazon Nova 2 Sonic vs Bolna API + MCP](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-bolna.md)\n- [Amazon Nova 2 Sonic vs Deepgram Voice Agent API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-deepgram-voice-agent.md)\n- [Amazon Nova 2 Sonic vs fone.me](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-fone-me.md)\n- [Amazon Nova 2 Sonic vs Gemini Live API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-gemini-live.md)\n- [Amazon Nova 2 Sonic vs GPT-Live](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-gpt-live.md)\n- [Amazon Nova 2 Sonic vs Harmony.ai](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-harmony-ai.md)\n- [Amazon Nova 2 Sonic vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-hume-evi.md)\n- [Amazon Nova 2 Sonic vs Inworld Realtime API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-inworld-realtime.md)\n- [Amazon Nova 2 Sonic vs LiveKit Agents](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-livekit-agents.md)\n- [Amazon Nova 2 Sonic vs OpenAI Realtime API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-openai-realtime.md)\n- [Amazon Nova 2 Sonic vs Pipecat](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-pipecat.md)\n- [Amazon Nova 2 Sonic vs PlaceCall](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-placecall.md)\n- [Amazon Nova 2 Sonic vs Retell AI API + MCP](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-retell-ai.md)\n- [Amazon Nova 2 Sonic vs Rime Prism](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-rime-prism.md)\n- [Amazon Nova 2 Sonic vs Synthflow API + MCP](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-synthflow.md)\n- [Amazon Nova 2 Sonic vs Ultravox Realtime API](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-ultravox.md)\n- [Amazon Nova 2 Sonic vs Vaani Developer Platform](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-vaani-voice.md)\n- [Amazon Nova 2 Sonic vs Vapi API + MCP](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-vapi.md)\n- [Amazon Nova 2 Sonic vs Vocily AI](https://www.anchorterminal.com/compare/amazon-nova-sonic-vs-vocily.md)\n- [Amazon Nova 2 Sonic vs Vogent 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