{
  "data": {
    "a": {
      "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",
      "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": "2026-09-29",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 71.5,
        "grade": "BB",
        "agentReady": true,
        "rank": 83,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 77,
          "maintenance": 85,
          "payments": 35,
          "reliability": 60,
          "schema": 92,
          "security": 76,
          "transparency": 79
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "API keys scoped to endpoint groups, with per-key credit limits and service accounts. $0.08 a minute excludes LLM tokens and carrier minutes.",
        "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",
          "Per-agent retention in days and per-agent zero retention mode",
          "Weekly changelog entries and SDKs for Python, JavaScript and mobile"
        ],
        "weaknesses": [
          "$0.08 a minute excludes LLM tokens and carrier minutes",
          "At least six incidents since July where agent calls failed or didn't start",
          "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",
          "Set `platform_settings.privacy.retention_days` where you don't need 2 years of history",
          "Pick a low-latency LLM, the pipeline waits on it every turn"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 71.5
          }
        ],
        "editorialScores": {
          "ergonomics": 77,
          "maintenance": 85,
          "payments": 35,
          "reliability": 60,
          "schema": 92,
          "security": 76,
          "transparency": 65
        },
        "provenanceScore": 92
      },
      "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": "2026-09-30",
        "score": 92
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/elevenlabs-agents.json",
      "live": {
        "slug": "elevenlabs-agents",
        "probe": {
          "target": "https://api.elevenlabs.io/v1/convai",
          "method": "get",
          "lastAt": "2026-10-05T01:43:36.837828051Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 149,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 151,
          "p95ms24h": 234,
          "samples24h": 272,
          "samples30d": 1122,
          "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": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.elevenlabs.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T01:46:28.850099847Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "elevenlabs/packages",
            "version": "@elevenlabs/react-native@1.2.28",
            "released": "2026-09-29",
            "seenAt": "2026-10-04T16:26:08.660019282Z"
          },
          {
            "registry": "npm",
            "name": "@elevenlabs/client",
            "version": "1.26.0",
            "seenAt": "2026-10-04T16:26:04.721219688Z"
          },
          {
            "registry": "npm",
            "name": "@elevenlabs/react",
            "version": "1.16.0",
            "seenAt": "2026-10-04T16:26:07.266415961Z"
          },
          {
            "registry": "pypi",
            "name": "elevenlabs",
            "version": "2.70.0",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:26:08.54621656Z"
          }
        ],
        "githubStars": 114,
        "npmWeekly": 1297130,
        "pypiWeekly": 2247596,
        "securityTxt": {
          "url": "https://elevenlabs.io/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-03-01T00:00:00.000Z",
          "checkedAt": "2026-10-04T15:15:51.968224287Z"
        },
        "llmsTxt": {
          "url": "https://elevenlabs.io/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:44.978252232Z"
        },
        "domain": {
          "domain": "elevenlabs.io",
          "checkedAt": "2026-10-04T13:07:28.958673807Z"
        },
        "pages": [
          {
            "url": "https://elevenlabs.io/docs/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:26.923147888Z",
            "changedAt": "2026-10-04T15:44:26.923147888Z",
            "fingerprint": "8e3b6c4cf3d2"
          },
          {
            "url": "https://elevenlabs.io/pricing/agents",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:32.960517089Z",
            "changedAt": "2026-10-02T15:20:53.807548529Z",
            "fingerprint": "95716cace61a"
          },
          {
            "url": "https://elevenlabs.io/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:36.955540789Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "469dd3f024fd"
          },
          {
            "url": "https://elevenlabs.io/terms-of-use",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:38.961637386Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ea0ee2e19b45"
          }
        ],
        "updatedAt": "2026-10-05T01:46:28.850099847Z"
      }
    },
    "b": {
      "slug": "synthflow",
      "name": "Synthflow API + MCP",
      "vendor": "Synthflow",
      "vendorUrl": "https://synthflow.ai",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Enterprise voice-agent platform built around a no-code Flow Designer and prompt builder, with a REST Platform API and a hosted MCP server.",
      "url": "https://www.anchorterminal.com/tools/synthflow",
      "markdownUrl": "https://www.anchorterminal.com/tools/synthflow.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/synthflow.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/synthflow.json",
      "repo": "https://github.com/SynthFlowAI/AnthropicPlugin",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.synthflow.ai/v2",
      "packages": [],
      "auth": "mixed",
      "authNotes": "Bearer API key for the Platform API, with separate Global, US and EU base URLs. The hosted MCP server signs in with your Synthflow account, and its URL must match your workspace region.",
      "pricing": "paid",
      "pricingNotes": "Sales-led only. Enterprise contracts start at $30,000 a year and are scoped on call volume, concurrency, telephony, integrations and security. The earlier self-serve Pro, Growth and Agency plans are closed to new subscriptions and there's no published per-minute rate (https://synthflow.ai/pricing).",
      "priceSummary": "Paid",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in the docs, pricing page or MCP docs (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 60,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.synthflow.ai",
      "llmsTxt": "https://docs.synthflow.ai/llms.txt",
      "openapi": "https://docs.synthflow.ai/openapi.json",
      "capabilities": [
        "voice.agent",
        "voice.pipeline",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "mcp",
        "llms-txt",
        "openapi",
        "webhooks",
        "pipeline",
        "enterprise"
      ],
      "lastRelease": "2026-10-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 51.3,
        "grade": "D",
        "agentReady": false,
        "rank": 352,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 9,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 45,
          "maintenance": 68,
          "payments": 0,
          "reliability": 45,
          "schema": 87,
          "security": 51,
          "transparency": 68
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Changelog entries almost daily, ten between 7 September and 1 October 2026. Sales-led only, contracts from $30,000 a year, no free tier.",
        "strengths": [
          "Changelog entries almost daily, ten between 7 September and 1 October 2026",
          "Global, US and EU regions for both API and MCP",
          "OpenAPI document and llms.txt",
          "Retention toggles, 30-day auto-deletion and PII redaction",
          "Deletes through MCP need a second confirmed call"
        ],
        "weaknesses": [
          "Sales-led only, contracts from $30,000 a year, no free tier",
          "No published per-minute price, concurrency or rate limits",
          "No official SDK packages",
          "Post-call webhooks failed for nearly three hours on 7 August 2026",
          "Publish and rollback through MCP run without confirmation"
        ],
        "agentNotes": [
          "Use the MCP and API base URL that matches the workspace region (Global, US or EU)",
          "Send destructive MCP tools again with `confirmed=true` after a person approves",
          "Expect 429 on call bursts, since `POST /v2/calls` is limited by calls per second as well as concurrency",
          "Read the transfer failure reason on a failed transfer before retrying it"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 51.3
          }
        ],
        "editorialScores": {
          "ergonomics": 45,
          "maintenance": 68,
          "payments": 0,
          "reliability": 45,
          "schema": 87,
          "security": 51,
          "transparency": 53
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl -X POST https://api.synthflow.ai/v2/calls -H \"Authorization: Bearer $SYNTHFLOW_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"model_id\":\"\u003cagent-id\u003e\",\"phone\":\"+15551234567\",\"name\":\"David\"}'",
        "claudeCode": "claude mcp add --transport http synthflow https://mcp.synthflow.ai/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/synthflow"
      },
      "area": "voice",
      "provenance": {
        "legalEntity": "AgentFlow AI GmbH",
        "domain": "synthflow.ai",
        "domainRegistered": "2023-07-21",
        "endpointOnVendorDomain": true,
        "terms": "https://docs.synthflow.ai/terms-conditions",
        "privacy": "https://docs.synthflow.ai/privacy-policy",
        "statusPage": "https://status.synthflow.ai",
        "changelog": "https://docs.synthflow.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/synthflow.json",
      "live": {
        "slug": "synthflow",
        "probe": {
          "target": "https://api.synthflow.ai/v2",
          "method": "get",
          "lastAt": "2026-10-05T01:43:46.279919147Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 175,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 188,
          "p95ms24h": 399,
          "samples24h": 272,
          "samples30d": 1122,
          "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": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.synthflow.ai",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T01:46:47.795450543Z"
        },
        "githubStars": 0,
        "securityTxt": {
          "url": "https://synthflow.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:39.825666303Z"
        },
        "llmsTxt": {
          "url": "https://docs.synthflow.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:17.135484926Z"
        },
        "domain": {
          "domain": "synthflow.ai",
          "registered": "2023-07-21",
          "source": "https://rdap.identitydigital.services/rdap/domain/synthflow.ai",
          "checkedAt": "2026-10-04T13:05:22.70407658Z"
        },
        "pages": [
          {
            "url": "https://docs.synthflow.ai/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:06.478375762Z",
            "changedAt": "2026-10-02T15:20:29.611067431Z",
            "fingerprint": "d9555340c631"
          },
          {
            "url": "https://synthflow.ai/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:48:18.850561804Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "63e74a7a5acd"
          },
          {
            "url": "https://docs.synthflow.ai/privacy-policy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:09.424908736Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "efaf26369f90"
          },
          {
            "url": "https://docs.synthflow.ai/terms-conditions",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:11.249829924Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3ed62f6822c3"
          }
        ],
        "updatedAt": "2026-10-05T01:46:47.795450543Z"
      }
    },
    "summary": "ElevenLabs Agents API + MCP has a score of 71.5 (BB) against Synthflow API + MCP's 51.3 (D). Both do voice agent. The largest gap is payments \u0026 pricing, 35 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-synthflow",
    "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-synthflow.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-synthflow.md",
    "slim": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-synthflow.min.md"
  },
  "markdown": "ElevenLabs Agents API + MCP has a score of 71.5 (BB) against Synthflow API + MCP's 51.3 (D). Both do voice agent. The largest gap is payments \u0026 pricing, 35 points.\n\n- ElevenLabs Agents API + MCP: grade BB, 71.5/100, rank #83 of 452. Markdown https://www.anchorterminal.com/tools/elevenlabs-agents.md · JSON https://www.anchorterminal.com/api/v1/tools/elevenlabs-agents.json\n- Synthflow API + MCP: grade D, 51.3/100, rank #352 of 452. Markdown https://www.anchorterminal.com/tools/synthflow.md · JSON https://www.anchorterminal.com/api/v1/tools/synthflow.json\n\n## Which one, for what\n\nPick ElevenLabs Agents API + MCP for reliability (+15), schema \u0026 documentation (+5), agent ergonomics (+32), security \u0026 auth (+25), payments \u0026 pricing (+35), maintenance \u0026 community (+17), transparency \u0026 trust (+11).\n\nPick Synthflow API + MCP for nothing in particular (no category where it leads by five points or more).\n\n## Score by category\n\n| Category | Weight | ElevenLabs Agents API + MCP | Synthflow API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 60 | 45 | ElevenLabs Agents API + MCP +15 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 92 | 87 | ElevenLabs Agents API + MCP +5 |\n| Agent ergonomics | 13% (16.2 this run) | 77 | 45 | ElevenLabs Agents API + MCP +32 |\n| Security \u0026 auth | 14% (17.5 this run) | 76 | 51 | ElevenLabs Agents API + MCP +25 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 0 | ElevenLabs Agents API + MCP +35 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 68 | ElevenLabs Agents API + MCP +17 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 79 | 68 | ElevenLabs Agents API + MCP +11 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **71.5 · BB** | **51.3 · D** | |\n\n## Facts side by side\n\n| Fact | ElevenLabs Agents API + MCP | Synthflow API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | ElevenLabs | Synthflow |\n| Hosted endpoint | `https://api.elevenlabs.io/v1/convai` | `https://api.synthflow.ai/v2` |\n| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | MIT (SDKs) | none |\n| Tools exposed | none | 60 |\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 | `io.elevenlabs/mcp` | not listed |\n| Last release | 2026-09-29 | 2026-10-01 |\n| Popularity | 114 stars, 1.2M npm/wk, 2.2M PyPI/wk | none |\n| Agent reviews | 3.5/5 (2) | 2/5 (2) |\n\n## Verdicts\n\n**ElevenLabs Agents API + MCP.** API keys scoped to endpoint groups, with per-key credit limits and service accounts. $0.08 a minute excludes LLM tokens and carrier minutes.\n\n**Synthflow API + MCP.** Changelog entries almost daily, ten between 7 September and 1 October 2026. Sales-led only, contracts from $30,000 a year, no free tier.\n\n## Before you call either\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. Set `platform_settings.privacy.retention_days` where you don't need 2 years of history\n5. Pick a low-latency LLM, the pipeline waits on it every turn\n\n### Synthflow API + MCP\n\n1. Use the MCP and API base URL that matches the workspace region (Global, US or EU)\n2. Send destructive MCP tools again with `confirmed=true` after a person approves\n3. Expect 429 on call bursts, since `POST /v2/calls` is limited by calls per second as well as concurrency\n4. Read the transfer failure reason on a failed transfer before retrying it\n\n## Other comparisons with ElevenLabs Agents API + MCP or Synthflow API + MCP\n\n- [Bland AI API + MCP vs ElevenLabs Agents API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-elevenlabs-agents.md)\n- [Bland AI API + MCP vs Synthflow API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-synthflow.md)\n- [Bolna API + MCP vs ElevenLabs Agents API + MCP](https://www.anchorterminal.com/compare/bolna-vs-elevenlabs-agents.md)\n- [Bolna API + MCP vs Synthflow API + MCP](https://www.anchorterminal.com/compare/bolna-vs-synthflow.md)\n- [Deepgram Voice Agent API vs ElevenLabs Agents API + MCP](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-elevenlabs-agents.md)\n- [Deepgram Voice Agent API vs Synthflow API + MCP](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-synthflow.md)\n- [ElevenLabs Agents API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-hume-evi.md)\n- [ElevenLabs Agents API + MCP vs Retell AI API + MCP](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-retell-ai.md)\n- [ElevenLabs Agents API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox.md)\n- [ElevenLabs Agents API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vapi.md)\n- [ElevenLabs Agents API + MCP vs Vogent API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent.md)\n- [Hume EVI (Empathic Voice Interface) vs Synthflow API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-synthflow.md)\n- [Retell AI API + MCP vs Synthflow API + MCP](https://www.anchorterminal.com/compare/retell-ai-vs-synthflow.md)\n- [Synthflow API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/synthflow-vs-ultravox.md)\n- [Synthflow API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/synthflow-vs-vapi.md)\n- [Synthflow API + MCP vs Vogent API](https://www.anchorterminal.com/compare/synthflow-vs-vogent.md)\n",
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-05",
    "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": "ElevenLabs Agents API + MCP vs Synthflow API + MCP",
        "url": ""
      }
    ],
    "description": "ElevenLabs Agents API + MCP has a score of 71.5 (BB) against Synthflow API + MCP's 51.3 (D). Both do voice agent. The largest gap is payments \u0026 pricing, 35 points. Category scores, facts, verdicts and agent notes side by side.",
    "facts": [
      "ElevenLabs Agents API + MCP BB 71.5",
      "Synthflow API + MCP D 51.3",
      "scores"
    ],
    "h1": "ElevenLabs Agents API + MCP vs Synthflow API + MCP",
    "image": "https://www.anchorterminal.com/assets/og/compare-elevenlabs-agents-vs-synthflow.png",
    "path": "/compare/elevenlabs-agents-vs-synthflow",
    "published": "2026-10-01",
    "section": "tools",
    "title": "ElevenLabs Agents API + MCP vs Synthflow API + MCP for AI agents",
    "toc": null,
    "updated": "2026-10-05",
    "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-synthflow"
  },
  "tokens": {
    "markdown": 1700,
    "slim": 380
  },
  "version": 1
}
