{
  "data": {
    "a": {
      "slug": "gemini-live",
      "name": "Gemini Live API",
      "vendor": "Google",
      "vendorUrl": "https://ai.google.dev",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Google's Live API runs real-time spoken conversations with Gemini audio-to-audio models over a stateful WebSocket. It takes audio, images and text, speaks back, and supports interruptions, function calling and Google Search grounding.",
      "url": "https://www.anchorterminal.com/tools/gemini-live",
      "markdownUrl": "https://www.anchorterminal.com/tools/gemini-live.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gemini-live.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gemini-live.json",
      "repo": "https://github.com/google-gemini/gemini-live-api-examples",
      "license": "Proprietary service under the Gemini API Additional Terms of Service. The Python and JavaScript SDKs are Apache-2.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://generativelanguage.googleapis.com/v1beta",
      "packages": [
        {
          "registry": "pypi",
          "name": "google-genai"
        },
        {
          "registry": "npm",
          "name": "@google/genai"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API key from Google AI Studio, tied to a Google Cloud project. Keys created since 28 May 2026 are authorisation keys bound to a service account and restricted to the Gemini API, and unrestricted standard keys are rejected. The raw WebSocket guide passes the key as a `key` query parameter. For browsers and phones, a backend mints an ephemeral token (preview) at `POST /v1beta/auth_tokens`, single use by default, 1 minute to start a session and 30 minutes to use it, optionally locked to a model and configuration.",
      "pricing": "freemium",
      "pricingNotes": "Free tier on the Live models with no billing account, where content is used to improve Google products. Paid tier per 1M tokens on `gemini-3.8-live`, the extended thinking model and `gemini-3.1-flash-live-preview`. Text in $0.75, audio in $3.00 (about $0.005 a minute), image or video in $1.00, text out $4.50, audio out $12.00 (about $0.018 a minute). Google Search grounding $14 per 1,000 queries after 5,000 free a month. Each turn re-bills the whole session context. Paid tier needs a linked billing account and a $5 minimum prepayment (https://ai.google.dev/gemini-api/docs/pricing, checked 2026-10-08).",
      "priceSummary": "$14 / 1k req",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the Live API docs, the pricing page or the billing guide (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 29486957,
        "pypiWeekly": 34128301,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://ai.google.dev/gemini-api/docs/live-api",
      "llmsTxt": "https://ai.google.dev/gemini-api/docs/llms.txt",
      "capabilities": [
        "voice.agent",
        "voice.speech-to-speech",
        "voice.tools"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "closed-source",
        "speech-to-speech",
        "websocket",
        "streaming",
        "python",
        "typescript",
        "llms-txt",
        "api-key",
        "function-calling"
      ],
      "lastRelease": "2026-09-15",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.1,
        "grade": "C",
        "agentReady": false,
        "rank": 560,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 7,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 69,
          "maintenance": 83,
          "payments": 40,
          "reliability": 41,
          "schema": 66,
          "security": 48,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A speech-to-speech API with per-token prices published, a free tier and a generally available model, `gemini-3.8-live`, since 15 September 2026. The documented raw WebSocket connection carries the API key in the URL, connections reset about every 10 minutes, and no SLA or readable incident history was found for the Developer API.",
        "bestFor": "Teams building their own voice or vision assistant on a single speech-to-speech model with function calling and Search grounding, who can run a backend for tokens and audio transport.",
        "strengths": [
          "`gemini-3.8-live` went generally available on 15 September 2026 with asynchronous function calling as the default and three response scheduling modes.",
          "Ephemeral tokens can be single use, expire in 30 minutes by default and be locked to a model and session configuration.",
          "Prices are public per million tokens with per-minute equivalents, $0.005 a minute of audio in and $0.018 a minute of audio out.",
          "Session resumption handles, a GoAway message with `timeLeft` and sliding-window context compression are documented for long sessions.",
          "Free tier on the Live models with no billing account, and paid-tier content isn't used to improve Google products per the pricing page."
        ],
        "weaknesses": [
          "The WebSocket guide authenticates with the API key as a `key` query parameter, and ephemeral tokens as an `access_token` query parameter.",
          "The status page at aistudio.google.com/status renders in the browser only, so no incident history could be read, and no SLA was found for the Developer API.",
          "No machine-readable contract for the WebSocket messages was found. The Discovery document types only the setup and token schemas.",
          "The capabilities, best practices and API reference pages still say the Live API is in preview, and the docs give both 70 and 99 supported languages.",
          "No telephony. Phone calls need a partner such as Voximplant, LiveKit or Pipecat, and concurrent session limits are shown only inside AI Studio."
        ],
        "agentNotes": [
          "Enable `sessionResumption` and keep the newest handle. Connections end after about 10 minutes, and handles stay valid for 2 hours.",
          "Set `contextWindowCompression` with a sliding window. Without it audio sessions stop at 15 minutes and audio with video at 2 minutes, and every turn re-bills the whole context.",
          "On `gemini-3.8-live` function calls are non-blocking by default. Set `behavior: BLOCKING` if the model must wait for the tool response.",
          "Send 16 kHz 16-bit PCM in 20 to 40 ms chunks and discard buffered playback when `interrupted` is true.",
          "Keep the API key on a server and send it through the SDK. Give browsers an ephemeral token from `POST /v1beta/auth_tokens`, locked with `liveConnectConstraints`."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 57.1
          }
        ],
        "editorialScores": {
          "ergonomics": 69,
          "maintenance": 83,
          "payments": 40,
          "reliability": 41,
          "schema": 66,
          "security": 48,
          "transparency": 55
        },
        "provenanceScore": 89
      },
      "connect": {
        "install": "pip install google-genai   # or: npm i @google/genai",
        "http": "curl -X POST \"https://generativelanguage.googleapis.com/v1beta/auth_tokens\" \\\n  -H \"x-goog-api-key: $GEMINI_API_KEY\" -H \"Content-Type: application/json\" \\\n  -d '{\"uses\": 1, \"liveConnectConstraints\": {\"model\": \"models/gemini-3.8-live\", \"config\": {\"sessionResumption\": {}, \"responseModalities\": [\"AUDIO\"]}}}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/gemini-live"
      },
      "sameCompany": [
        "gemini-api",
        "gemini-embedding",
        "vertex-ai-tuning",
        "google-model-armor",
        "google-imagen",
        "google-veo",
        "google-lyria",
        "google-speech-to-text",
        "google-adk",
        "google-secret-manager",
        "google-weather-api",
        "chrome-devtools-mcp",
        "google-maps-platform",
        "google-cloud-translation",
        "google-calendar-api",
        "firebase-cloud-messaging",
        "google-drive-api",
        "gemini-cli",
        "google-search-console",
        "google-ads-api",
        "google-forms",
        "google-sheets-api",
        "gmail-api"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "gemini-3.8-live audio input",
          "unit": "audio-minute",
          "usd": 0.005,
          "note": "$3.00 per 1M audio tokens, charged while the API is listening"
        },
        {
          "item": "gemini-3.8-live audio output",
          "unit": "audio-minute",
          "usd": 0.018,
          "note": "$12.00 per 1M audio tokens"
        },
        {
          "item": "gemini-3.8-live text input",
          "unit": "1m-tokens",
          "usd": 0.75
        },
        {
          "item": "gemini-3.8-live text output",
          "unit": "1m-tokens",
          "usd": 4.5,
          "note": "includes thinking tokens and transcription text"
        },
        {
          "item": "Google Search grounding",
          "unit": "1k-requests",
          "usd": 14,
          "note": "after 5,000 free search queries a month shared across Gemini 3.x models"
        }
      ],
      "provenance": {
        "legalEntity": "Google LLC",
        "domain": "google.com",
        "domainRegistered": "1997-09-15",
        "endpointOnVendorDomain": true,
        "terms": "https://ai.google.dev/gemini-api/terms",
        "privacy": "https://policies.google.com/privacy",
        "statusPage": "https://aistudio.google.com/status",
        "changelog": "https://ai.google.dev/gemini-api/docs/changelog",
        "securityTxt": "valid",
        "checked": "2026-10-08",
        "notes": [
          "The WebSocket and the token endpoint are on generativelanguage.googleapis.com, Google's API domain. The docs are on ai.google.dev.",
          "RDAP for google.com gives a registration date of 1997-09-15.",
          "The Gemini API Additional Terms of Service are effective 23 March 2026 and incorporate the Google APIs Terms of Service. Paid services fall under Google's Data Processing Addendum for products where Google is a data processor.",
          "The Google Privacy Policy read on 8 October 2026 is effective 1 October 2026. It is Google's general policy, and the terms page is where API data use is set out.",
          "www.google.com/.well-known/security.txt expires 2030-04-01 and points to g.co/vulnz and the vulnerability reward programme. ai.google.dev has no security.txt of its own (404).",
          "aistudio.google.com/status answered 200 with a page drawn by script, so no component or incident history was read."
        ],
        "score": 89
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/gemini-live.json",
      "live": {
        "slug": "gemini-live",
        "probe": {
          "target": "https://generativelanguage.googleapis.com/v1beta",
          "method": "get",
          "lastAt": "2026-10-09T10:42:44.067853492Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 17,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 25,
          "p95ms24h": 49,
          "samples24h": 33,
          "samples30d": 33,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 33,
              "ok": 33
            }
          ]
        },
        "updatedAt": "2026-10-09T10:42:44.067853492Z"
      }
    },
    "answer": "Vapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing.",
    "b": {
      "slug": "vapi",
      "name": "Vapi API + MCP",
      "vendor": "Vapi",
      "vendorUrl": "https://vapi.ai",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Developer platform for phone and web voice agents.",
      "url": "https://www.anchorterminal.com/tools/vapi",
      "markdownUrl": "https://www.anchorterminal.com/tools/vapi.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/vapi.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/vapi.json",
      "repo": "https://github.com/VapiAI/mcp-server",
      "license": "MIT (MCP server)",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.vapi.ai",
      "packages": [
        {
          "registry": "npm",
          "name": "@vapi-ai/server-sdk"
        },
        {
          "registry": "npm",
          "name": "@vapi-ai/web"
        },
        {
          "registry": "pypi",
          "name": "vapi_server_sdk"
        },
        {
          "registry": "npm",
          "name": "@vapi-ai/mcp-server"
        }
      ],
      "auth": "api-key",
      "authNotes": "Private API key as a bearer token for the REST API and the hosted MCP server at `https://mcp.vapi.ai/mcp` (an SSE endpoint also exists). A separate public key is for browser calls with the Web SDK. The local MCP server reads `VAPI_TOKEN`.",
      "pricing": "usage",
      "pricingNotes": "Usage only is $0.05 a minute Vapi hosting, plus transcriber, model, voice and telephony at provider cost, prepaid with $5 of free credits to start. Vapi telephony, SIP, WebSockets and WebRTC transport are free, Twilio inbound runs $0.008 a minute and outbound $0.014. Success Packages add support and limits on top of usage, Core $29 a month and Pro 10 per cent of the hosting fee with a $999 monthly minimum. Add-ons include HIPAA at $2,000 a month and extra concurrent lines at $10 a line a month. The vendor's calculator puts 1,000 minutes with Deepgram, OpenAI and ElevenLabs at roughly $0.08 to $0.13 a minute all in (https://vapi.ai/pricing).",
      "priceSummary": "$29 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in the docs, pricing page or MCP docs (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 20,
      "popularity": {
        "githubStars": 57,
        "npmWeekly": 177088,
        "pypiWeekly": 42248,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.vapi.ai",
      "llmsTxt": "https://docs.vapi.ai/llms.txt",
      "openapi": "https://api.vapi.ai/api-json",
      "capabilities": [
        "voice.agent",
        "voice.pipeline",
        "voice.speech-to-speech",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "streaming",
        "pipeline",
        "speech-to-speech",
        "enterprise"
      ],
      "lastRelease": "2026-09-21",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 63.5,
        "grade": "B",
        "agentReady": false,
        "rank": 354,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 5,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 64,
          "maintenance": 88,
          "payments": 35,
          "reliability": 70,
          "schema": 89,
          "security": 58,
          "transparency": 73
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -4,
        "negativeNotes": [
          "2026-06-03. A compromised developer GitHub token was used to push malicious code to Vapi repositories and publish four malicious `@vapi-ai/server-sdk` versions (0.11.1, 0.11.2, 1.2.1, 1.2.2) to npm. Vapi says they were removed within about three hours with zero downloads and no customer data exposed, and it published a write-up. Fixed and documented, so we deduct 4 of a possible 15 (https://vapi.ai/blog/our-response-to-june-3-supply-chain-incident)."
        ],
        "verdict": "Voice agents can combine supported transcription, model and voice providers, including customer-supplied endpoints. Per-minute cost depends on the selected providers.",
        "bestFor": "Developers who want to choose every provider, bring their own keys and tune cost against latency.",
        "strengths": [
          "Any mix of transcriber, model and voice provider, or your own keys and endpoints",
          "OpenAPI file, llms.txt and a weekly changelog",
          "Public keys limited to allowed origins and assistants",
          "99 per cent uptime SLA on the Pro package, 99.9 per cent on Premier",
          "Versioned assistants and tools with draft and publish since August 2026"
        ],
        "weaknesses": [
          "Real per-minute cost depends on provider choices",
          "Usage only has 4 concurrent lines and 14 days of retention",
          "MCP tools that place calls or buy numbers carry no annotations",
          "No request rate limits or Retry-After guidance found",
          "Malicious SDK versions reached npm for about three hours on 3 June 2026"
        ],
        "agentNotes": [
          "Read `subscriptionLimits.concurrencyBlocked` in the `POST /call` response, a full account queues the call rather than failing",
          "Confirm with a person before `vapi_create_call` or `vapi_buy_phone_number`, the server won't ask",
          "Pin transcriber, model and voice and set fallback plans so one provider outage doesn't drop calls",
          "Read the call log's cost breakdown to see what each provider charged",
          "Check `@vapi-ai/server-sdk` isn't pinned to 0.11.1, 0.11.2, 1.2.1 or 1.2.2"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 63.5
          }
        ],
        "editorialScores": {
          "ergonomics": 64,
          "maintenance": 88,
          "payments": 35,
          "reliability": 70,
          "schema": 89,
          "security": 58,
          "transparency": 70
        },
        "provenanceScore": 76
      },
      "connect": {
        "http": "curl https://api.vapi.ai/call -H \"Authorization: Bearer $VAPI_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"assistantId\":\"\u003cassistant-id\u003e\",\"phoneNumberId\":\"\u003cphone-number-id\u003e\",\"customer\":{\"number\":\"+15551234567\"}}'",
        "claudeCode": "claude mcp add --transport http vapi https://mcp.vapi.ai/mcp --header \"Authorization: Bearer $VAPI_API_KEY\"",
        "config": {
          "mcpServers": {
            "vapi": {
              "args": [
                "-y",
                "@vapi-ai/mcp-server"
              ],
              "command": "npx",
              "env": {
                "VAPI_TOKEN": "${VAPI_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/vapi"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "Vapi hosting",
          "unit": "call-minute",
          "usd": 0.05,
          "note": "platform fee only, transcriber, model, voice and telephony billed on top at cost"
        },
        {
          "item": "Twilio outbound transport",
          "unit": "call-minute",
          "usd": 0.014,
          "note": "US, passed through"
        },
        {
          "item": "Twilio inbound transport",
          "unit": "call-minute",
          "usd": 0.008,
          "note": "US, passed through"
        },
        {
          "item": "Core Success Package",
          "unit": "month",
          "usd": 29
        },
        {
          "item": "Pro Success Package minimum",
          "unit": "month",
          "usd": 999,
          "note": "10 per cent of hosting fees, $999 minimum"
        },
        {
          "item": "Extra concurrent call line",
          "unit": "month",
          "usd": 10
        },
        {
          "item": "HIPAA add-on",
          "unit": "month",
          "usd": 2000
        }
      ],
      "provenance": {
        "legalEntity": "Vapi Inc.",
        "domain": "vapi.ai",
        "domainRegistered": "2023-08-22",
        "endpointOnVendorDomain": true,
        "terms": "https://vapi.ai/terms-of-service",
        "privacy": "https://vapi.ai/privacy",
        "statusPage": "https://status.vapi.ai",
        "changelog": "https://docs.vapi.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "The terms name Vapi Inc., a Delaware corporation."
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/vapi.json",
      "live": {
        "slug": "vapi",
        "probe": {
          "target": "https://api.vapi.ai",
          "method": "get",
          "lastAt": "2026-10-09T10:43:00.558152711Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 219,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 207,
          "p95ms24h": 1456,
          "samples24h": 260,
          "samples30d": 2300,
          "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": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 114,
              "ok": 114
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.vapi.ai",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-09T07:58:38.39426521Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "VapiAI/mcp-server",
            "version": "v0.0.11",
            "released": "2026-08-14",
            "seenAt": "2026-10-08T16:33:53.141467787Z"
          },
          {
            "registry": "npm",
            "name": "@vapi-ai/mcp-server",
            "version": "0.0.11",
            "seenAt": "2026-10-08T16:33:51.388978782Z"
          },
          {
            "registry": "npm",
            "name": "@vapi-ai/server-sdk",
            "version": "2.0.1",
            "seenAt": "2026-10-08T16:33:47.824745138Z"
          },
          {
            "registry": "npm",
            "name": "@vapi-ai/web",
            "version": "2.7.1",
            "seenAt": "2026-10-08T16:33:49.362046159Z"
          },
          {
            "registry": "pypi",
            "name": "vapi_server_sdk",
            "version": "1.11.1",
            "released": "2026-05-20",
            "seenAt": "2026-10-08T16:33:51.177577329Z"
          }
        ],
        "githubStars": 57,
        "npmWeekly": 201562,
        "pypiWeekly": 44207,
        "securityTxt": {
          "url": "https://vapi.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:39:05.792740068Z"
        },
        "llmsTxt": {
          "url": "https://docs.vapi.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:01:04.401741448Z"
        },
        "domain": {
          "domain": "vapi.ai",
          "registered": "2023-08-22",
          "source": "https://rdap.identitydigital.services/rdap/domain/vapi.ai",
          "checkedAt": "2026-10-04T13:10:12.103273987Z"
        },
        "pages": [
          {
            "url": "https://docs.vapi.ai/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:19:42.551636345Z",
            "changedAt": "2026-10-08T18:19:42.551636345Z",
            "fingerprint": "ccc854cf802d"
          },
          {
            "url": "https://docs.vapi.ai/whats-new",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-01T13:13:04.652536748Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "8b20b96ab7a4"
          },
          {
            "url": "https://docs.vapi.ai/workflows/legacy-migration",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-08T18:19:45.861288487Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "9f62a32477a4"
          },
          {
            "url": "https://vapi.ai/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:29.553060246Z",
            "changedAt": "2026-10-06T16:13:21.353726202Z",
            "fingerprint": "d528b534573c"
          },
          {
            "url": "https://vapi.ai/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:31.628408889Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "f13594373bcf"
          },
          {
            "url": "https://vapi.ai/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:33.706344943Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "4b1fd29445f7"
          }
        ],
        "updatedAt": "2026-10-09T10:43:00.558152711Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Google",
        "b": "Vapi",
        "name": "Vendor"
      },
      {
        "a": "https://generativelanguage.googleapis.com/v1beta",
        "b": "https://api.vapi.ai",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, Streamable HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under the Gemini API Additional Terms of Service. The Python and JavaScript SDKs are Apache-2.0",
        "b": "MIT (MCP server)",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "20",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-15",
        "b": "2026-09-21",
        "name": "Last release"
      },
      {
        "a": "2026-04-28",
        "b": "2026-09-14",
        "name": "Terms last updated"
      },
      {
        "a": "2026-10-01",
        "b": "2023-09-09",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "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": "29.5M npm/wk, 34.1M PyPI/wk",
        "b": "57 stars, 177k npm/wk, 42k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Vapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing.",
        "question": "Which is better for AI agents, Gemini Live API or Vapi API + MCP?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Gemini Live API and Vapi API + MCP need an API key?"
      },
      {
        "answer": "Yes. Gemini Live API has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Vapi API + MCP at https://api.vapi.ai.",
        "question": "Can an agent call Gemini Live API and Vapi API + MCP without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Agent ergonomics, 69 against 64",
          "Payments \u0026 pricing, 40 against 35"
        ],
        "also": [
          "No incidents deducted, where Vapi API + MCP loses 4 points for them"
        ],
        "goodFor": "Teams building their own voice or vision assistant on a single speech-to-speech model with function calling and Search grounding, who can run a backend for tokens and audio transport.",
        "slug": "gemini-live",
        "watchFor": "The WebSocket guide authenticates with the API key as a `key` query parameter, and ephemeral tokens as an `access_token` query parameter."
      },
      {
        "aheadOn": [
          "Reliability, 70 against 41",
          "Schema \u0026 documentation, 89 against 66",
          "Security \u0026 auth, 58 against 48",
          "Maintenance \u0026 community, 88 against 83"
        ],
        "also": [
          "Runs on your own machine",
          "Free to start without a card"
        ],
        "goodFor": "Developers who want to choose every provider, bring their own keys and tune cost against latency.",
        "slug": "vapi",
        "watchFor": "Real per-minute cost depends on provider choices"
      }
    ],
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    },
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      },
      {
        "json": "https://www.anchorterminal.com/compare/bland-ai-vs-vapi.json",
        "title": "Bland AI API + MCP vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/bland-ai-vs-vapi"
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      {
        "json": "https://www.anchorterminal.com/compare/bolna-vs-gemini-live.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/bolna-vs-vapi.json",
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        "url": "https://www.anchorterminal.com/compare/bolna-vs-vapi"
      },
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        "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-gemini-live.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vapi.json",
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        "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vapi"
      },
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        "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gemini-live.json",
        "title": "ElevenLabs Agents API + MCP vs Gemini Live API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gemini-live"
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      {
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        "title": "ElevenLabs Agents API + MCP vs Vapi API + MCP",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi.json",
        "title": "Gemini Live API vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-retell-ai.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-retell-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-synthflow.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-synthflow"
      },
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        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.json",
        "title": "Gemini Live API vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-vocily.json",
        "title": "Gemini Live API vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-vogent.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-vapi.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/retell-ai-vs-vapi.json",
        "title": "Retell AI API + MCP vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/retell-ai-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/synthflow-vs-vapi.json",
        "title": "Synthflow API + MCP vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/synthflow-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ultravox-vs-vapi.json",
        "title": "Ultravox Realtime API vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/ultravox-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/vapi-vs-vocily.json",
        "title": "Vapi API + MCP vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/vapi-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/vapi-vs-vogent.json",
        "title": "Vapi API + MCP vs Vogent API",
        "url": "https://www.anchorterminal.com/compare/vapi-vs-vogent"
      }
    ],
    "scores": [
      {
        "by": 29,
        "edge": "vapi",
        "gemini-live": 41,
        "key": "reliability",
        "name": "Reliability",
        "vapi": 70,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 23,
        "edge": "vapi",
        "gemini-live": 66,
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "vapi": 89,
        "weight": 13
      },
      {
        "by": 5,
        "edge": "gemini-live",
        "gemini-live": 69,
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "vapi": 64,
        "weight": 13
      },
      {
        "by": 10,
        "edge": "vapi",
        "gemini-live": 48,
        "key": "security",
        "name": "Security \u0026 auth",
        "vapi": 58,
        "weight": 14
      },
      {
        "by": 5,
        "edge": "gemini-live",
        "gemini-live": 40,
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "vapi": 35,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 5,
        "edge": "vapi",
        "gemini-live": 83,
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "vapi": 88,
        "weight": 7
      },
      {
        "by": 1,
        "edge": "vapi",
        "gemini-live": 72,
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "vapi": 73,
        "weight": 7
      }
    ],
    "summary": "Vapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing. Both do voice agent.",
    "verdicts": {
      "gemini-live": "A speech-to-speech API with per-token prices published, a free tier and a generally available model, `gemini-3.8-live`, since 15 September 2026. The documented raw WebSocket connection carries the API key in the URL, connections reset about every 10 minutes, and no SLA or readable incident history was found for the Developer API.",
      "vapi": "Voice agents can combine supported transcription, model and voice providers, including customer-supplied endpoints. Per-minute cost depends on the selected providers."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/gemini-live-vs-vapi",
    "json": "https://www.anchorterminal.com/compare/gemini-live-vs-vapi.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
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    "slim": "https://www.anchorterminal.com/compare/gemini-live-vs-vapi.min.md"
  },
  "markdown": "Vapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing. Both do voice agent.\n\n- Gemini Live API: grade C, 57.1/100, rank #560 of 842. Markdown https://www.anchorterminal.com/tools/gemini-live.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-live.json\n- Vapi API + MCP: grade B, 63.5/100, rank #354 of 842. Markdown https://www.anchorterminal.com/tools/vapi.md · JSON https://www.anchorterminal.com/api/v1/tools/vapi.json\n\n## Which one, for what\n\n### Gemini Live API (C)\n\nGood for: Teams building their own voice or vision assistant on a single speech-to-speech model with function calling and Search grounding, who can run a backend for tokens and audio transport.\n\nAhead on:\n- Agent ergonomics, 69 against 64\n- Payments \u0026 pricing, 40 against 35\n\nAlso in its favour:\n- No incidents deducted, where Vapi API + MCP loses 4 points for them\n\nWatch for: The WebSocket guide authenticates with the API key as a `key` query parameter, and ephemeral tokens as an `access_token` query parameter.\n\n### Vapi API + MCP (B)\n\nGood for: Developers who want to choose every provider, bring their own keys and tune cost against latency.\n\nAhead on:\n- Reliability, 70 against 41\n- Schema \u0026 documentation, 89 against 66\n- Security \u0026 auth, 58 against 48\n- Maintenance \u0026 community, 88 against 83\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: Real per-minute cost depends on provider choices\n\n\n## Score by category\n\n| Category | Weight | Gemini Live API | Vapi API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 41 | 70 | Vapi API + MCP +29 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 66 | 89 | Vapi API + MCP +23 |\n| Agent ergonomics | 13% (16.2 this run) | 69 | 64 | Gemini Live API +5 |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 58 | Vapi API + MCP +10 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 35 | Gemini Live API +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 88 | Vapi API + MCP +5 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 73 | Vapi API + MCP +1 |\n| Negative events | ≤15 | 0 | -4 | |\n| **Total** | | **57.1 · C** | **63.5 · B** | |\n\n## Facts side by side\n\n| Fact | Gemini Live API | Vapi API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Google | Vapi |\n| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://api.vapi.ai` |\n| Transports | HTTP | HTTP, Streamable HTTP, stdio |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary service under the Gemini API Additional Terms of Service. The Python and JavaScript SDKs are Apache-2.0 | MIT (MCP server) |\n| Tools exposed | none | 20 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-15 | 2026-09-21 |\n| Terms last updated | 2026-04-28 | 2026-09-14 |\n| Privacy policy last updated | 2026-10-01 | 2023-09-09 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 29.5M npm/wk, 34.1M PyPI/wk | 57 stars, 177k npm/wk, 42k PyPI/wk |\n| Agent reviews | none | 2.5/5 (2) |\n\n## Verdicts\n\n**Gemini Live API.** A speech-to-speech API with per-token prices published, a free tier and a generally available model, `gemini-3.8-live`, since 15 September 2026. The documented raw WebSocket connection carries the API key in the URL, connections reset about every 10 minutes, and no SLA or readable incident history was found for the Developer API.\n\n**Vapi API + MCP.** Voice agents can combine supported transcription, model and voice providers, including customer-supplied endpoints. Per-minute cost depends on the selected providers.\n\n## Before you call either\n\n### Gemini Live API\n\n1. Enable `sessionResumption` and keep the newest handle. Connections end after about 10 minutes, and handles stay valid for 2 hours.\n2. Set `contextWindowCompression` with a sliding window. Without it audio sessions stop at 15 minutes and audio with video at 2 minutes, and every turn re-bills the whole context.\n3. On `gemini-3.8-live` function calls are non-blocking by default. Set `behavior: BLOCKING` if the model must wait for the tool response.\n4. Send 16 kHz 16-bit PCM in 20 to 40 ms chunks and discard buffered playback when `interrupted` is true.\n5. Keep the API key on a server and send it through the SDK. Give browsers an ephemeral token from `POST /v1beta/auth_tokens`, locked with `liveConnectConstraints`.\n\n### Vapi API + MCP\n\n1. Read `subscriptionLimits.concurrencyBlocked` in the `POST /call` response, a full account queues the call rather than failing\n2. Confirm with a person before `vapi_create_call` or `vapi_buy_phone_number`, the server won't ask\n3. Pin transcriber, model and voice and set fallback plans so one provider outage doesn't drop calls\n4. Read the call log's cost breakdown to see what each provider charged\n5. Check `@vapi-ai/server-sdk` isn't pinned to 0.11.1, 0.11.2, 1.2.1 or 1.2.2\n\n## Questions\n\n### Which is better for AI agents, Gemini Live API or Vapi API + MCP?\n\nVapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing.\n\n### Do Gemini Live API and Vapi API + MCP need an API key?\n\nBoth need an API key.\n\n### Can an agent call Gemini Live API and Vapi API + MCP without installing anything?\n\nYes. Gemini Live API has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Vapi API + MCP at https://api.vapi.ai.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gemini-live-vs-vapi.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gemini-live-vs-vapi.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gemini-live\", \"b\": \"vapi\"}`. From a terminal: `anchor compare gemini-live vapi`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gemini-live.json and https://www.anchorterminal.com/api/v1/tools/vapi.json\n\n## Other comparisons with Gemini Live API or Vapi API + MCP\n\n- [Bland AI API + MCP vs Gemini Live API](https://www.anchorterminal.com/compare/bland-ai-vs-gemini-live.md)\n- [Bland AI API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-vapi.md)\n- [Bolna API + MCP vs Gemini Live API](https://www.anchorterminal.com/compare/bolna-vs-gemini-live.md)\n- [Bolna API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/bolna-vs-vapi.md)\n- [Deepgram Voice Agent API vs Gemini Live API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-gemini-live.md)\n- [Deepgram Voice Agent API vs Vapi API + MCP](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vapi.md)\n- [ElevenLabs Agents API + MCP vs Gemini Live API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gemini-live.md)\n- [ElevenLabs Agents API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vapi.md)\n- [Gemini Live API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi.md)\n- [Gemini Live API vs Retell AI API + MCP](https://www.anchorterminal.com/compare/gemini-live-vs-retell-ai.md)\n- [Gemini Live API vs Synthflow API + MCP](https://www.anchorterminal.com/compare/gemini-live-vs-synthflow.md)\n- [Gemini Live API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.md)\n- [Gemini Live API vs Vocily AI](https://www.anchorterminal.com/compare/gemini-live-vs-vocily.md)\n- [Gemini Live API vs Vogent API](https://www.anchorterminal.com/compare/gemini-live-vs-vogent.md)\n- [Hume EVI (Empathic Voice Interface) vs Vapi API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-vapi.md)\n- [Retell AI API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/retell-ai-vs-vapi.md)\n- [Synthflow API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/synthflow-vs-vapi.md)\n- [Ultravox Realtime API vs Vapi API + MCP](https://www.anchorterminal.com/compare/ultravox-vs-vapi.md)\n- [Vapi API + MCP vs Vocily AI](https://www.anchorterminal.com/compare/vapi-vs-vocily.md)\n- [Vapi API + MCP vs Vogent API](https://www.anchorterminal.com/compare/vapi-vs-vogent.md)\n",
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    "description": "Vapi API + MCP scores 63.5 (B) on agent readiness against Gemini Live API's 57.1 (C), and leads in 5 of 7 scored categories. Gemini Live API leads on agent ergonomics and payments \u0026 pricing. Both do voice agent. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Gemini Live API vs Vapi API + MCP for AI agents, C 57.1 vs B 63.5",
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