{ "data": { "a": { "slug": "plivo-voice", "name": "Plivo Voice API", "vendor": "Plivo", "vendorUrl": "https://www.plivo.com", "kind": "http-api", "category": "voice-calling", "summary": "REST and XML call control for inbound and outbound PSTN calls, with bidirectional WebSocket audio streams, SIP trunking, recording and conferencing.", "url": "https://www.anchorterminal.com/tools/plivo-voice", "markdownUrl": "https://www.anchorterminal.com/tools/plivo-voice.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/plivo-voice.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/plivo-voice.json", "repo": "https://github.com/plivo/plivo-node", "license": "MIT", "transports": [ "http" ], "remoteUrl": "https://api.plivo.com/v1", "packages": [ { "registry": "npm", "name": "plivo" }, { "registry": "pypi", "name": "plivo" } ], "auth": "api-key", "authNotes": "HTTP Basic auth with Auth ID and Auth Token. The Auth ID also appears in every request path. Webhooks carry a signature you can validate.", "pricing": "usage", "pricingNotes": "Pay as you go with $10 of trial credit and no card. US outbound $0.0115 a minute to local numbers and $0.006 to toll-free, inbound $0.0055 on local and $0.018 on toll-free numbers, SIP or browser legs $0.0033. Local numbers $0.50 a month, toll-free $1. Recording is free with 90 days of storage, then $0.0004 a minute. Transcription $0.0095 a minute, machine detection and conferencing free (https://www.plivo.com/voice/pricing/us/).", "priceSummary": "$0.50 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 or stablecoin payment path in the voice docs, pricing or llms.txt (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 102, "npmWeekly": 50920, "pypiWeekly": 69307, "asOf": "2026-09-30" }, "docsUrl": "https://plivo.com/docs/voice", "llmsTxt": "https://www.plivo.com/docs/llms.txt", "capabilities": [ "voice.calls", "voice.numbers", "voice.streaming", "voice.sip", "voice.recording", "voice.transfer" ], "tags": [ "hosted", "no-card", "llms-txt", "typescript", "python", "webhooks", "streaming" ], "lastRelease": "2026-09-25", "graded": true, "anchor": { "graded": true, "score": 60.4, "grade": "C", "agentReady": false, "rank": 248, "ranked": true, "rankOf": 452, "categoryRank": 7, "methodology": "0.3", "run": "2026-10-01", "scores": { "ergonomics": 70, "maintenance": 78, "payments": 40, "reliability": 68, "schema": 59, "security": 45, "transparency": 70 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge. 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account.", "strengths": [ "US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge", "Bidirectional audio streams in linear PCM at 8, 16 or 24 kHz or mu-law at 8 kHz", "Published limits per plan, including concurrency and what happens above them", "$10 trial credit with no card", "SOC 2, PCI DSS Level 1 and HIPAA per the security page" ], "weaknesses": [ "1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account", "No OpenAPI spec, availability SLA or DPA found", "No MCP server that can place calls, the official one searches docs only", "Call status webhooks failed for a subset of calls for about 6.5 hours on 25 August", "No scoped keys, security.txt or bug bounty" ], "agentNotes": [ "Point the answer URL at XML with a Stream element and bidirectional set to true for a live voice agent", "Check concurrency before dialling out in bulk. Above it calls are rejected with hangup cause 5030, above CPS they queue", "Don't rely on the status callback alone to learn a call ended. Poll the call if the webhook doesn't arrive", "Validate webhook signatures before acting on call events" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.4 } ], "editorialScores": { "ergonomics": 70, "maintenance": 78, "payments": 40, "reliability": 68, "schema": 59, "security": 45, "transparency": 50 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://api.plivo.com/v1/Account/$PLIVO_AUTH_ID/Call/\" -u \"$PLIVO_AUTH_ID:$PLIVO_AUTH_TOKEN\" \\\n -H \"Content-Type: application/json\" -d '{\"from\":\"+14155550100\",\"to\":\"+14155550101\",\"answer_url\":\"https://example.com/answer.xml\",\"answer_method\":\"GET\"}'" }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/plivo-voice" }, "sameCompany": [ "plivo" ], "area": "voice", "unitPrices": [ { "item": "US outbound, local", "unit": "call-minute", "usd": 0.0115, "note": "outbound to US local numbers" }, { "item": "US outbound, toll-free", "unit": "call-minute", "usd": 0.006, "note": "outbound to US toll-free numbers" }, { "item": "US inbound, local number", "unit": "call-minute", "usd": 0.0055, "note": "inbound on a US local number" }, { "item": "US inbound, toll-free number", "unit": "call-minute", "usd": 0.018, "note": "inbound on a US toll-free number" }, { "item": "SIP or browser leg", "unit": "call-minute", "usd": 0.0033, "note": "inbound or outbound" }, { "item": "US local number", "unit": "month", "usd": 0.5, "note": "per number" }, { "item": "US toll-free number", "unit": "month", "usd": 1, "note": "per number" } ], "provenance": { "legalEntity": "Plivo Inc.", "domain": "plivo.com", "domainRegistered": "2011-04-17", "endpointOnVendorDomain": true, "terms": "https://www.plivo.com/legal/tos/", "privacy": "https://www.plivo.com/legal/privacy/", "statusPage": "https://status.plivo.com", "changelog": "https://www.plivo.com/changelog/", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Provenance shared with the Plivo messaging listing. Legal entity taken from the site footer." ], "score": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/plivo-voice.json", "live": { "slug": "plivo-voice", "probe": { "target": "https://api.plivo.com/v1", "method": "get", "lastAt": "2026-10-04T23:48:14.226514564Z", "lastOk": true, "lastStatus": 404, "lastMs": 328, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 331, "p95ms24h": 399, "samples24h": 272, "samples30d": 1100, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 270, "ok": 270 } ] }, "vendorStatus": { "page": "https://status.plivo.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-04T23:49:24.983286555Z" }, "versions": [ { "registry": "github", "name": "plivo/plivo-node", "version": "v4.79.0", "released": "2026-07-28", "seenAt": "2026-10-04T16:37:02.932876885Z" }, { "registry": "npm", "name": "plivo", "version": "4.79.0", "seenAt": "2026-10-04T16:37:02.343552611Z" }, { "registry": "pypi", "name": "plivo", "version": "4.63.0", "released": "2026-09-25", "seenAt": "2026-10-04T16:37:02.742133321Z" } ], "githubStars": 102, "npmWeekly": 54280, "pypiWeekly": 76309, "securityTxt": { "url": "https://plivo.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-04T15:15:48.932052901Z" }, "llmsTxt": { "url": "https://www.plivo.com/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-04T15:18:08.052494644Z" }, "domain": { "domain": "plivo.com", "registered": "2011-04-17", "source": "https://rdap.verisign.com/com/v1/domain/plivo.com", "checkedAt": "2026-10-04T13:07:46.742269573Z" }, "pages": [ { "url": "https://www.plivo.com/changelog/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-04T15:51:43.585881332Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "1fc13e7b957e" }, { "url": "https://www.plivo.com/voice/pricing/us/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-04T15:51:51.724997892Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "d0eca0fa3c87" }, { "url": "https://www.plivo.com/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-04T15:51:46.52507636Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "7cd64079a8cf" }, { "url": "https://www.plivo.com/legal/tos/", "kind": "terms", "status": 200, "checkedAt": "2026-10-04T15:51:47.691771662Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "eaee9886500f" } ], "updatedAt": "2026-10-04T23:49:24.983286555Z" } }, "b": { "slug": "twilio-voice", "name": "Twilio Programmable Voice API + MCP", "vendor": "Twilio", "vendorUrl": "https://www.twilio.com", "kind": "http-api", "category": "voice-calling", "summary": "Programmable Voice for placing and answering calls on Twilio numbers in 100+ countries, controlled with TwiML or REST.", "url": "https://www.anchorterminal.com/tools/twilio-voice", "markdownUrl": "https://www.anchorterminal.com/tools/twilio-voice.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/twilio-voice.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/twilio-voice.json", "repo": "https://github.com/twilio-labs/mcp", "license": "MIT", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.twilio.com/2010-04-01", "packages": [ { "registry": "npm", "name": "twilio" }, { "registry": "pypi", "name": "twilio" }, { "registry": "npm", "name": "@twilio-alpha/mcp" } ], "auth": "mixed", "authNotes": "HTTP Basic auth with the Account SID and Auth Token, or an API key SID and secret (recommended). Webhooks and Media Streams or ConversationRelay websocket connections carry an `X-Twilio-Signature` to validate. The hosted docs MCP needs no credentials. The local alpha MCP takes `ACCOUNT_SID/API_KEY:API_SECRET` as a command-line argument.", "pricing": "usage", "pricingNotes": "Pay as you go, per minute. US outbound $0.014 a minute, inbound $0.0085 on local numbers and $0.022 on toll-free. Local numbers $1.15 a month, toll-free $2.15. Media Streams $0.0044 a minute, ConversationRelay $0.07 a minute, SIP interface and browser or app calls $0.004 a minute, recording $0.0025 a minute plus $0.0005 a minute a month storage, transcription $0.05 a minute, answering machine detection $0.0075 a call. The trial needs no card and gives free units, including 75 voice minutes, for 30 days (https://www.twilio.com/en-us/voice/pricing/us, https://www.twilio.com/docs/usage/tutorials/how-to-use-your-free-trial-account).", "priceSummary": "$1.15 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).", "endpoints": [] }, "toolCount": 2, "popularity": { "githubStars": 111, "npmWeekly": 7213599, "pypiWeekly": 4834611, "asOf": "2026-09-30" }, "docsUrl": "https://www.twilio.com/docs/voice", "llmsTxt": "https://www.twilio.com/docs/llms.txt", "openapi": "https://raw.githubusercontent.com/twilio/twilio-oai/main/spec/json/twilio_api_v2010.json", "capabilities": [ "voice.calls", "voice.numbers", "voice.streaming", "voice.sip", "voice.recording", "voice.transfer" ], "tags": [ "hosted", "no-card", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks", "streaming", "enterprise" ], "lastRelease": "2026-09-28", "graded": true, "anchor": { "graded": true, "score": 80.4, "grade": "A", "agentReady": true, "rank": 6, "ranked": true, "rankOf": 452, "categoryRank": 1, "methodology": "0.3", "run": "2026-10-01", "scores": { "ergonomics": 80, "maintenance": 85, "payments": 40, "reliability": 90, "schema": 92, "security": 85, "transparency": 81 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits. US outbound at $0.014 a minute, plus $0.0044 for Media Streams or $0.07 for ConversationRelay.", "strengths": [ "Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits", "Restricted API keys with up to 100 endpoint permissions each", "Public OpenAPI specs, llms.txt with Markdown twins, and a numbered error dictionary", "No-card trial with 75 free voice minutes for 30 days", "twilio-node released three times in the last 90 days, most recently 6.1.2 on 2026-09-28" ], "weaknesses": [ "US outbound at $0.014 a minute, plus $0.0044 for Media Streams or $0.07 for ConversationRelay", "1 outbound call a second per account by default", "No idempotency key on call creation", "The MCP that can place calls is an alpha last published in July 2025, and the hosted one only searches docs", "No security.txt on twilio.com" ], "agentNotes": [ "Use `\u003cConnect\u003e\u003cStream\u003e` for two-way audio. It blocks further TwiML until the websocket closes", "Use `\u003cConnect\u003e\u003cConversationRelay\u003e` when you only want to handle text, and set `interruptible` for barge-in", "Trial calls reach only verified numbers in your sign-up country", "Retry a 429 with backoff, but check the Calls list before retrying a create that timed out, since there's no idempotency key", "Validate `X-Twilio-Signature` on every webhook and websocket upgrade" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.1, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "A", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 80.4 } ], "editorialScores": { "ergonomics": 80, "maintenance": 85, "payments": 40, "reliability": 90, "schema": 92, "security": 85, "transparency": 72 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID/Calls.json\" \\\n -u \"$TWILIO_API_KEY:$TWILIO_API_SECRET\" \\\n --data-urlencode \"To=+15558675310\" --data-urlencode \"From=+15017122661\" \\\n --data-urlencode \"Twiml=\u003cResponse\u003e\u003cSay\u003eHello from Twilio\u003c/Say\u003e\u003c/Response\u003e\"", "claudeCode": "claude mcp add --transport http twilio-docs https://mcp.twilio.com/docs", "config": { "mcpServers": { "twilio": { "args": [ "-y", "@twilio-alpha/mcp", "${TWILIO_ACCOUNT_SID}/${TWILIO_API_KEY}:${TWILIO_API_SECRET}", "--services", "twilio_api_v2010" ], "command": "npx" } } } }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/twilio-voice" }, "sameCompany": [ "stytch-connected-apps", "sendgrid", "twilio" ], "area": "voice", "unitPrices": [ { "item": "Outbound call, US", "unit": "call-minute", "usd": 0.014, "note": "local or toll-free destinations" }, { "item": "Inbound call, US local number", "unit": "call-minute", "usd": 0.0085 }, { "item": "Inbound call, US toll-free number", "unit": "call-minute", "usd": 0.022 }, { "item": "US local number", "unit": "month", "usd": 1.15 }, { "item": "US toll-free number", "unit": "month", "usd": 2.15 }, { "item": "Media Streams", "unit": "call-minute", "usd": 0.0044, "note": "on top of call minutes" }, { "item": "ConversationRelay", "unit": "call-minute", "usd": 0.07, "note": "on top of call minutes" }, { "item": "Call recording", "unit": "call-minute", "usd": 0.0025 } ], "provenance": { "legalEntity": "Twilio Inc.", "domain": "twilio.com", "domainRegistered": "2007-10-26", "endpointOnVendorDomain": true, "terms": "https://www.twilio.com/en-us/legal/tos", "privacy": "https://www.twilio.com/en-us/legal/privacy", "statusPage": "https://status.twilio.com", "changelog": "https://www.twilio.com/en-us/changelog", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The terms also name Twilio Ireland Limited for customers outside the US." ], "score": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/twilio-voice.json", "live": { "slug": "twilio-voice", "probe": { "target": "https://api.twilio.com/2010-04-01", "method": "get", "lastAt": "2026-10-04T23:48:17.369535415Z", "lastOk": true, "lastStatus": 200, "lastMs": 28, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 27, "p95ms24h": 66, "samples24h": 272, "samples30d": 1100, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 270, "ok": 270 } ] }, "vendorStatus": { "page": "https://status.twilio.com", "indicator": "minor", "summary": "Partially Degraded Service", "checkedAt": "2026-10-04T23:49:30.414129457Z" }, "versions": [ { "registry": "github", "name": "twilio-labs/mcp", "version": "0.0.3", "released": "2025-03-25", "seenAt": "2026-10-04T16:42:28.341727729Z" }, { "registry": "npm", "name": "@twilio-alpha/mcp", "version": "0.7.0", "seenAt": "2026-10-04T16:42:26.54293887Z" }, { "registry": "npm", "name": "twilio", "version": "6.1.2", "seenAt": "2026-10-04T16:42:26.104679108Z" }, { "registry": "pypi", "name": "twilio", "version": "9.11.2", "released": "2026-09-28", "seenAt": "2026-10-04T16:42:26.381954279Z" } ], "githubStars": 112, "npmWeekly": 7817134, "pypiWeekly": 5153208, "securityTxt": { "url": "https://twilio.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-04T15:15:43.282608786Z" }, "llmsTxt": { "url": "https://www.twilio.com/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-04T15:18:18.461750128Z" }, "domain": { "domain": "twilio.com", "registered": "2007-10-26", "source": "https://rdap.verisign.com/com/v1/domain/twilio.com", "checkedAt": "2026-10-04T13:05:12.523190086Z" }, "pages": [ { "url": "https://www.twilio.com/en-us/voice/pricing/us", "kind": "pricing", "status": 200, "checkedAt": "2026-10-04T15:52:42.057003458Z", "changedAt": "2026-10-03T15:40:33.277161645Z", "fingerprint": "870f6e38fa5f" } ], "updatedAt": "2026-10-04T23:49:30.414129457Z" } }, "summary": "Twilio Programmable Voice API + MCP has a score of 80.4 (A) against Plivo Voice API's 60.4 (C). Both do voice calls. The largest gap is security \u0026 auth, 40 points." }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice", "json": "https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice.md", "slim": "https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice.min.md" }, "markdown": "Twilio Programmable Voice API + MCP has a score of 80.4 (A) against Plivo Voice API's 60.4 (C). Both do voice calls. The largest gap is security \u0026 auth, 40 points.\n\n- Plivo Voice API: grade C, 60.4/100, rank #248 of 452. Markdown https://www.anchorterminal.com/tools/plivo-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/plivo-voice.json\n- Twilio Programmable Voice API + MCP: grade A, 80.4/100, rank #6 of 452. Markdown https://www.anchorterminal.com/tools/twilio-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/twilio-voice.json\n\n## Which one, for what\n\nPick Plivo Voice API for nothing in particular (no category where it leads by five points or more).\n\nPick Twilio Programmable Voice API + MCP for reliability (+22), schema \u0026 documentation (+33), agent ergonomics (+10), security \u0026 auth (+40), maintenance \u0026 community (+7), transparency \u0026 trust (+11).\n\n## Score by category\n\n| Category | Weight | Plivo Voice API | Twilio Programmable Voice API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 68 | 90 | Twilio Programmable Voice API + MCP +22 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 59 | 92 | Twilio Programmable Voice API + MCP +33 |\n| Agent ergonomics | 13% (16.2 this run) | 70 | 80 | Twilio Programmable Voice API + MCP +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 45 | 85 | Twilio Programmable Voice API + MCP +40 |\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) | 78 | 85 | Twilio Programmable Voice API + MCP +7 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 70 | 81 | Twilio Programmable Voice API + MCP +11 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.4 · C** | **80.4 · A** | |\n\n## Facts side by side\n\n| Fact | Plivo Voice API | Twilio Programmable Voice API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Plivo | Twilio |\n| Hosted endpoint | `https://api.plivo.com/v1` | `https://api.twilio.com/2010-04-01` |\n| Transports | HTTP | HTTP, Streamable HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | none | 2 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-25 | 2026-09-28 |\n| Popularity | 102 stars, 51k npm/wk, 69k PyPI/wk | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk |\n| Agent reviews | 3.5/5 (2) | 3.1/5 (8) |\n\n## Verdicts\n\n**Plivo Voice API.** US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge. 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account.\n\n**Twilio Programmable Voice API + MCP.** Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits. US outbound at $0.014 a minute, plus $0.0044 for Media Streams or $0.07 for ConversationRelay.\n\n## Before you call either\n\n### Plivo Voice API\n\n1. Point the answer URL at XML with a Stream element and bidirectional set to true for a live voice agent\n2. Check concurrency before dialling out in bulk. Above it calls are rejected with hangup cause 5030, above CPS they queue\n3. Don't rely on the status callback alone to learn a call ended. Poll the call if the webhook doesn't arrive\n4. Validate webhook signatures before acting on call events\n\n### Twilio Programmable Voice API + MCP\n\n1. Use `\u003cConnect\u003e\u003cStream\u003e` for two-way audio. It blocks further TwiML until the websocket closes\n2. Use `\u003cConnect\u003e\u003cConversationRelay\u003e` when you only want to handle text, and set `interruptible` for barge-in\n3. Trial calls reach only verified numbers in your sign-up country\n4. Retry a 429 with backoff, but check the Calls list before retrying a create that timed out, since there's no idempotency key\n5. Validate `X-Twilio-Signature` on every webhook and websocket upgrade\n\n## Other comparisons with Plivo Voice API or Twilio Programmable Voice API + MCP\n\n- [Bandwidth Voice API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-plivo-voice.md)\n- [Bandwidth Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-twilio-voice.md)\n- [Exotel Voice API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/exotel-voice-vs-plivo-voice.md)\n- [Exotel Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-twilio-voice.md)\n- [Infobip Calls API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/infobip-calls-vs-plivo-voice.md)\n- [Infobip Calls API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-twilio-voice.md)\n- [Plivo Voice API vs SignalWire Voice API](https://www.anchorterminal.com/compare/plivo-voice-vs-signalwire-voice.md)\n- [Plivo Voice API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-sinch-voice.md)\n- [Plivo Voice API vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-telnyx-voice.md)\n- [Plivo Voice API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-vonage-voice.md)\n- [Plivo Voice API vs Voximplant](https://www.anchorterminal.com/compare/plivo-voice-vs-voximplant.md)\n- [SignalWire Voice API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-twilio-voice.md)\n- [Sinch Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-twilio-voice.md)\n- [Telnyx Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/telnyx-voice-vs-twilio-voice.md)\n- [Twilio Programmable Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/twilio-voice-vs-vonage-voice.md)\n- [Twilio Programmable Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/twilio-voice-vs-voximplant.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-04", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.3", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Plivo Voice API vs Twilio Programmable Voice API + MCP", "url": "" } ], "description": "Twilio Programmable Voice API + MCP has a score of 80.4 (A) against Plivo Voice API's 60.4 (C). Both do voice calls. The largest gap is security \u0026 auth, 40 points. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Plivo Voice API C 60.4", "Twilio Programmable Voice API + MCP A 80.4", "scores" ], "h1": "Plivo Voice API vs Twilio Programmable Voice API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-plivo-voice-vs-twilio-voice.png", "path": "/compare/plivo-voice-vs-twilio-voice", "published": "2026-10-01", "section": "tools", "title": "Plivo Voice API vs Twilio Programmable Voice API + MCP for AI agents", "toc": null, "updated": "2026-10-04", "url": "https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice" }, "tokens": { "markdown": 1750, "slim": 380 }, "version": 1 }