{
  "data": {
    "a": {
      "slug": "openai-realtime",
      "name": "OpenAI Realtime API",
      "vendor": "OpenAI",
      "vendorUrl": "https://openai.com",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "OpenAI's Realtime API runs spoken conversations with speech-to-speech models such as `gpt-realtime-2.1`. Clients connect over WebRTC, WebSocket or SIP, and sessions support interruptions, function calling and remote MCP tools.",
      "url": "https://www.anchorterminal.com/tools/openai-realtime",
      "markdownUrl": "https://www.anchorterminal.com/tools/openai-realtime.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/openai-realtime.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/openai-realtime.json",
      "repo": "https://github.com/openai/openai-agents-js",
      "license": "Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.openai.com/v1/realtime",
      "packages": [
        {
          "registry": "npm",
          "name": "@openai/agents"
        },
        {
          "registry": "npm",
          "name": "@openai/agents-realtime"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API key from platform.openai.com, sent as a Bearer header on server WebSocket connections and call-control requests. For browsers and phones, a server calls `POST /v1/realtime/client_secrets` for a client secret (`ek_`) that lasts 10 seconds to 2 hours, 10 minutes by default, and can start several sessions until it expires. The browser WebSocket example passes the secret as a subprotocol. SIP calls are tied to a project by the project ID in the SIP address.",
      "pricing": "usage",
      "pricingNotes": "Per 1M tokens on `gpt-realtime-2.1`. Audio $32.00 in, $0.40 cached and $64.00 out, text $4.00 in and $24.00 out, image $5.00 in. `gpt-realtime-2.1-mini` is $10.00 and $20.00 for audio. Each response re-sends the whole conversation, and input transcription is billed separately. Usage tiers start at $5 of credit purchases. Whether the Free tier covers Realtime models was not established (https://developers.openai.com/api/docs/pricing.md, checked 2026-10-09).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the Realtime guides, the pricing page or the OpenAPI file (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://developers.openai.com/api/docs/guides/realtime",
      "llmsTxt": "https://developers.openai.com/api/docs/llms.txt",
      "openapi": "https://github.com/openai/openai-openapi/blob/main/openapi.yaml",
      "capabilities": [
        "voice.agent",
        "voice.speech-to-speech",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "usage-priced",
        "closed-source",
        "speech-to-speech",
        "webrtc",
        "websocket",
        "sip",
        "streaming",
        "typescript",
        "python",
        "openapi",
        "llms-txt",
        "api-key",
        "function-calling",
        "mcp-client",
        "status-page"
      ],
      "lastRelease": "2026-07-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 63.4,
        "grade": "B",
        "agentReady": false,
        "rank": 457,
        "ranked": true,
        "rankOf": 1222,
        "categoryRank": 10,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 76,
          "maintenance": 52,
          "payments": 20,
          "reliability": 67,
          "schema": 84,
          "security": 61,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-10-09"
        },
        "negative": 0,
        "verdict": "A generally available speech-to-speech API with WebRTC, WebSocket and SIP transports, a public OpenAPI file that types its events, and per-token prices. Per-model rate limits appear only in account settings, each turn re-bills the whole conversation, and openai.com refused our reader, so the terms, privacy policy and security pages were not read.",
        "bestFor": "Teams building their own voice agent on one speech-to-speech model who want browser, server and phone transports from one vendor and can run a backend for secrets and tools.",
        "strengths": [
          "The OpenAPI 3.1 file in `openai/openai-openapi` covers nine Realtime paths and types 13 client events and 48 server events as schemas.",
          "Browser clients use client secrets that expire after 10 seconds to 2 hours, 10 minutes by default, so the API key stays on a server.",
          "Remote MCP tools accept an `allowed_tools` list, and `require_approval` defaults to `always` in the OpenAPI file.",
          "SIP calls connect at `sip.api.openai.com` with accept, reject, refer and hangup endpoints and a signed incoming-call webhook.",
          "The data controls page lists `/v1/realtime` with no training use, 30-day abuse logs, no stored application state and Zero Data Retention eligibility."
        ],
        "weaknesses": [
          "openai.com answered 403 to our reader, so the service terms, privacy policy, sub-processor list and security pages were not read.",
          "Realtime rate limits are shown only in account settings. The public table gives numbers for GPT-6 model families only.",
          "Every response re-sends the whole conversation, so later turns cost more. Audio is $32 in and $64 out per 1M tokens on `gpt-realtime-2.1`.",
          "The status feed names Realtime among affected components in five incidents between 24 July and 6 October 2026, with durations not shown in the feed.",
          "Session settings attached to a client secret can be overridden by the client connection, per the client secret reference."
        ],
        "agentNotes": [
          "Create a client secret on a server with `POST /v1/realtime/client_secrets` and give browsers only the `ek_` value. Never ship the API key.",
          "After a response with MCP calls finishes, send another `response.create`. The API does not create the follow-up response itself.",
          "Set `truncation` with a `retention_ratio` below 1 and `token_limits.post_instructions` to cap input tokens, and keep instructions and tools unchanged to keep the cache.",
          "On a WebSocket, stop playback on `input_audio_buffer.speech_started` and send `conversation.item.truncate` with `audio_end_ms`. WebRTC and SIP truncate on the server.",
          "Use `gpt-realtime-2.1` or `gpt-realtime-2.1-mini`. `gpt-realtime` and `gpt-realtime-mini` shut down on 20 January 2027."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3.3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "B",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 63.4
          }
        ],
        "editorialScores": {
          "ergonomics": 76,
          "maintenance": 52,
          "payments": 20,
          "reliability": 67,
          "schema": 84,
          "security": 61,
          "transparency": 58
        },
        "provenanceScore": 86,
        "checked": {
          "categories": {
            "ergonomics": "2026-10-09",
            "maintenance": "2026-10-09",
            "payments": "2026-10-09",
            "reliability": "2026-10-09",
            "schema": "2026-10-09",
            "security": "2026-10-09",
            "transparency": "2026-10-09"
          },
          "last": "2026-10-09",
          "lastMoved": "2026-10-27",
          "oldest": "2026-10-09",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "npm install @openai/agents",
        "http": "curl -X POST https://api.openai.com/v1/realtime/client_secrets \\\n  -H \"Authorization: Bearer $OPENAI_API_KEY\" -H \"Content-Type: application/json\" \\\n  -d '{\"session\": {\"type\": \"realtime\", \"model\": \"gpt-realtime-2.1\"}}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/openai-realtime"
      },
      "sameCompany": [
        "openai-api",
        "openai-embeddings",
        "openai-guardrails",
        "openai-moderation",
        "openai-image-api",
        "openai-sora",
        "openai-speech-to-text",
        "gpt-live",
        "openai-agents-sdk",
        "openai-decisions-api",
        "openai-codex",
        "gpt-oss-120b",
        "gpt-oss-20b"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "gpt-realtime-2.1 audio input",
          "unit": "1m-tokens",
          "usd": 32,
          "note": "$0.40 cached. 1 token per 100 ms of user audio, about $0.019 a minute before caching"
        },
        {
          "item": "gpt-realtime-2.1 audio output",
          "unit": "1m-tokens",
          "usd": 64,
          "note": "1 token per 50 ms of assistant audio, about $0.077 a minute"
        },
        {
          "item": "gpt-realtime-2.1 text input",
          "unit": "1m-tokens",
          "usd": 4,
          "note": "$0.40 cached"
        },
        {
          "item": "gpt-realtime-2.1 text output",
          "unit": "1m-tokens",
          "usd": 24
        },
        {
          "item": "gpt-realtime-2.1-mini audio input",
          "unit": "1m-tokens",
          "usd": 10,
          "note": "$0.30 cached"
        },
        {
          "item": "gpt-realtime-2.1-mini audio output",
          "unit": "1m-tokens",
          "usd": 20
        }
      ],
      "provenance": {
        "legalEntity": "OpenAI",
        "domain": "openai.com",
        "domainRegistered": "2007-01-19",
        "endpointOnVendorDomain": true,
        "terms": "https://openai.com/policies/services-agreement/",
        "privacy": "https://openai.com/policies/privacy-policy/",
        "statusPage": "https://status.openai.com",
        "changelog": "https://developers.openai.com/api/docs/changelog",
        "securityTxt": "unknown",
        "checked": "2026-10-09",
        "notes": [
          "The API, WebRTC and SIP endpoints are on api.openai.com and sip.api.openai.com. The docs are on developers.openai.com.",
          "RDAP for openai.com gives a registration date of 2007-01-19.",
          "The legal entity was not read. The SDK licence file says Copyright (c) 2025 OpenAI.",
          "robots.txt answered 200 on developers.openai.com and openai.com, allowing the pages read, and 404 on status.openai.com, which means no rules.",
          "openai.com answered our researcher with a bot check on 9 October 2026, so the terms and privacy policy were not read on that day. The links are the two documents OpenAI's other listings here carry. openai.com answers our policy reader with HTTP 403 as well, so neither document has been read and both are recorded as unreadable."
        ],
        "score": 86
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/openai-realtime.json",
      "live": {
        "slug": "openai-realtime",
        "probe": {
          "target": "https://api.openai.com/v1/realtime",
          "method": "get",
          "lastAt": "2026-10-29T20:41:21.163768504Z",
          "lastOk": true,
          "lastStatus": 405,
          "lastMs": 408,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 172,
          "p95ms24h": 263,
          "samples24h": 249,
          "samples30d": 5065,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 85
            },
            {
              "date": "2026-10-10",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
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            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 256,
              "ok": 256
            },
            {
              "date": "2026-10-19",
              "probes": 255,
              "ok": 255
            },
            {
              "date": "2026-10-20",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-21",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-22",
              "probes": 253,
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            {
              "date": "2026-10-23",
              "probes": 248,
              "ok": 248
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            {
              "date": "2026-10-24",
              "probes": 251,
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            {
              "date": "2026-10-25",
              "probes": 250,
              "ok": 250
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            {
              "date": "2026-10-26",
              "probes": 252,
              "ok": 252
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            {
              "date": "2026-10-27",
              "probes": 249,
              "ok": 249
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            {
              "date": "2026-10-28",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-29",
              "probes": 215,
              "ok": 215
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.openai.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-29T20:31:25.977629053Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "openai/openai-agents-js",
            "version": "@openai/agents-extensions@0.21.0",
            "released": "2026-10-20",
            "seenAt": "2026-10-29T13:29:18.007154927Z"
          },
          {
            "registry": "npm",
            "name": "@openai/agents",
            "version": "0.21.0",
            "seenAt": "2026-10-29T13:29:15.751608233Z"
          },
          {
            "registry": "npm",
            "name": "@openai/agents-realtime",
            "version": "0.21.0",
            "seenAt": "2026-10-29T13:29:16.286729607Z"
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        ],
        "githubStars": 3954,
        "npmWeekly": 1947753,
        "securityTxt": {
          "url": "https://openai.com/.well-known/security.txt",
          "state": "valid",
          "checkedAt": "2026-10-29T15:36:33.568201368Z"
        },
        "llmsTxt": {
          "url": "https://developers.openai.com/api/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-29T15:05:15.338159324Z"
        },
        "domain": {
          "domain": "openai.com",
          "registered": "2007-01-19",
          "source": "https://rdap.verisign.com/com/v1/domain/openai.com",
          "checkedAt": "2026-10-25T14:03:43.431333965Z"
        },
        "pages": [
          {
            "url": "https://developers.openai.com/api/docs/pricing.md",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-29T05:02:55.891915116Z",
            "changedAt": "2026-10-27T03:42:49.232741662Z",
            "fingerprint": "a4ac657bec4e"
          }
        ],
        "github": {
          "repo": "openai/openai-agents-js",
          "checkedAt": "2026-10-26T07:52:14.773572865Z",
          "stars": 3943,
          "archived": false,
          "issuesEnabled": true,
          "pushedAt": "2026-10-23T23:33:57Z",
          "openIssues": 11,
          "openPRs": 5,
          "issuesOpened90d": 61,
          "issuesClosed90d": 71,
          "prsMerged90d": 339,
          "ci": {
            "branch": "main",
            "runs": 50,
            "success": 46,
            "failure": 4,
            "other": 0,
            "latest": "success",
            "latestAt": "2026-10-21T20:20:38Z"
          },
          "replies": {
            "sampled": 25,
            "unanswered": 7,
            "medianDays": 0.4
          }
        },
        "updatedAt": "2026-10-29T20:41:21.163768504Z"
      }
    },
    "answer": "OpenAI Realtime API scores 63.4 (B) on agent readiness against Rime Prism's 57.9 (C), and leads in 5 of 7 scored categories. Rime Prism leads on payments \u0026 pricing and maintenance \u0026 community.",
    "b": {
      "slug": "rime-prism",
      "name": "Rime Prism",
      "vendor": "Rime Labs",
      "vendorUrl": "https://www.rime.ai/prism",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Prism is Rime's speech-to-speech model for voice agents. It takes caller audio over one WebSocket, decides when the caller has finished, calls the developer's tools and replies in speech with matching text, in English.",
      "url": "https://www.anchorterminal.com/tools/rime-prism",
      "markdownUrl": "https://www.anchorterminal.com/tools/rime-prism.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/rime-prism.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/rime-prism.json",
      "license": "Proprietary hosted service under Rime's terms. The Rime SDK used to call it (github.com/rimelabs/rime-sdk) is MIT.",
      "transports": [
        "websocket"
      ],
      "remoteUrl": "wss://prism.api.rime.ai/v1/realtime",
      "packages": [
        {
          "registry": "pypi",
          "name": "rimelabs-sdk"
        },
        {
          "registry": "npm",
          "name": "@rimelabs/sdk"
        },
        {
          "registry": "go",
          "name": "github.com/rimelabs/rime-sdk/go"
        },
        {
          "registry": "cargo",
          "name": "rimelabs-sdk"
        }
      ],
      "auth": "api-key",
      "authNotes": "Rime API key from the dashboard, sent as `Authorization: Bearer` on the WebSocket upgrade from a backend. Prism reads no query parameters, so the key can't go in the URL, and it has no ephemeral tokens for browsers or phones. The same key covers Rime's text-to-speech and speech-to-text. No scoped or read-only keys were found in the docs.",
      "pricing": "freemium",
      "pricingNotes": "$0.08 a minute of call audio on Flex (pay as you go, card billed monthly) and $0.064 on Scale ($100 a month of credit, 20% off). Every account gets $50 of usage a month across Rime's models, Prism included, with no card. Fine-tuning, custom voices, VPC or on-prem deployment, SLAs and a BAA are Enterprise items with custom pricing (https://www.rime.ai/pricing, checked 2026-10-28).",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the Prism docs, the API reference or the pricing page, checked 2026-10-28. Paid plans bill a card monthly.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-28"
      },
      "docsUrl": "https://docs.rime.ai/docs/prism/overview",
      "llmsTxt": "https://docs.rime.ai/llms.txt",
      "capabilities": [
        "voice.speech-to-speech",
        "voice.agent",
        "voice.tools"
      ],
      "tags": [
        "hosted",
        "freemium",
        "no-card",
        "free-tier",
        "closed-source",
        "speech-to-speech",
        "websocket",
        "streaming",
        "function-calling",
        "llms-txt",
        "python",
        "typescript",
        "go",
        "rust",
        "status-page",
        "soc2",
        "hipaa",
        "enterprise"
      ],
      "lastRelease": "2026-10-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.9,
        "grade": "C",
        "agentReady": false,
        "rank": 686,
        "ranked": true,
        "rankOf": 1222,
        "categoryRank": 14,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 73,
          "maintenance": 65,
          "payments": 40,
          "reliability": 41,
          "schema": 69,
          "security": 56,
          "transparency": 70
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-28"
        },
        "negative": 0,
        "verdict": "Prism's WebSocket API is well documented for a launch-day product, with typed events, 41 error codes that say what to do and a published per-minute price with free monthly usage. It has no Prism component or history on Rime's status page, no published concurrency limit, alpha SDKs, English only, and no data-handling statement that covers caller audio.",
        "bestFor": "English voice agents on Rime's cloud that want one speech-to-speech model with their own tools, and teams moving an OpenAI Realtime beta client who can bridge phone audio themselves.",
        "strengths": [
          "Errors page lists 41 codes, each with scope, the field at fault, a correlation ID and what to do",
          "$0.08 a minute on Flex, with $50 of free usage a month and no card",
          "Uses OpenAI Realtime beta event names, with a migration guide for WebSocket, LiveKit, Pipecat and OpenAI SDK clients",
          "Key only in the upgrade header, and Prism reads no query parameters",
          "Context truncation is configurable and each reply reports what was left out and its token usage"
        ],
        "weaknesses": [
          "Rime's status page had no Prism component on launch day, and there is no incident history for it",
          "No concurrency limit per account or key was found, and a full server refuses with 503",
          "All four SDKs are 0.1.0 alpha releases that may change their API",
          "English only, four voices, 16 kHz PCM16 in, with no mu-law, so phone calls need a bridge",
          "Privacy and security pages describe text in, audio out, and say nothing specific about caller audio"
        ],
        "agentNotes": [
          "Connect from a backend with `Authorization: Bearer`, since Prism has no browser tokens and reads no query parameters.",
          "Send `session.update` before any audio, or every append fails with `session_not_initialized`.",
          "Keep streaming audio, silence included, while Prism speaks, because it finds turn ends and interruptions from that audio.",
          "Ask for the continuation after each tool result, since Prism doesn't resume on its own, and never rerun a call with an unknown outcome.",
          "Pin the exact SDK version, because the SDKs are alpha and a new release can change the API."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 57.9
          }
        ],
        "editorialScores": {
          "ergonomics": 73,
          "maintenance": 65,
          "payments": 40,
          "reliability": 41,
          "schema": 69,
          "security": 56,
          "transparency": 58
        },
        "provenanceScore": 81,
        "checked": {
          "categories": {
            "ergonomics": "2026-10-28",
            "maintenance": "2026-10-28",
            "payments": "2026-10-28",
            "reliability": "2026-10-28",
            "schema": "2026-10-28",
            "security": "2026-10-28",
            "transparency": "2026-10-28"
          },
          "last": "2026-10-28",
          "oldest": "2026-10-28",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "uv add \"rimelabs-sdk==0.1.0a25\""
      },
      "letme": {
        "capability": "https://letme.dev/voice.speech-to-speech",
        "tool": "https://letme.dev/rime-prism"
      },
      "sameCompany": [
        "rime-tts"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Prism, Flex",
          "unit": "call-minute",
          "usd": 0.08,
          "note": "Metered by the minute of call audio, pay as you go. Pricing page, checked 28 October 2026"
        },
        {
          "item": "Prism, Scale",
          "unit": "call-minute",
          "usd": 0.064,
          "note": "20% off Flex for $100 a month of credit, which rolls over up to $200. Pricing page, checked 28 October 2026"
        }
      ],
      "provenance": {
        "legalEntity": "Rime Labs, Inc.",
        "domain": "rime.ai",
        "domainRegistered": "2020-03-12",
        "endpointOnVendorDomain": true,
        "terms": "https://www.rime.ai/terms",
        "privacy": "https://www.rime.ai/privacy",
        "statusPage": "https://www.rimestat.us",
        "changelog": "https://docs.rime.ai/docs/changelog",
        "securityTxt": "none",
        "checked": "2026-10-28",
        "notes": [
          "The terms name Rime Labs, Inc., the same entity as the rime-tts listing. The domain registration date stands per that listing's check of 30 September 2026 and wasn't re-read.",
          "status.rime.ai redirects to www.rimestat.us, an incident.io page with Text-to-speech API and Platform API components and data since 30 August 2026. It had no Prism component on 28 October 2026.",
          "www.rime.ai/.well-known/security.txt answered 404. The security page links a vulnerability disclosure policy.",
          "The Prism endpoint is on prism.api.rime.ai, under the vendor's own domain."
        ],
        "score": 81
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/rime-prism.json",
      "live": {
        "slug": "rime-prism",
        "probe": {
          "target": "wss://prism.api.rime.ai/v1/realtime",
          "method": "get",
          "lastAt": "2026-10-29T20:41:25.616992818Z",
          "lastOk": false,
          "lastStatus": 0,
          "lastMs": 0,
          "lastNote": "unsupported protocol scheme \"wss\"",
          "authRequired": false,
          "uptime24h": 0,
          "uptime30d": 0,
          "p50ms24h": 0,
          "p95ms24h": 0,
          "samples24h": 36,
          "samples30d": 36,
          "days": [
            {
              "date": "2026-10-29",
              "probes": 36,
              "ok": 0
            }
          ],
          "outages": [
            {
              "start": "2026-10-29T17:19:57.075096127Z",
              "end": "0001-01-01T00:00:00Z",
              "note": "unsupported protocol scheme \"wss\""
            }
          ]
        },
        "vendorStatus": {
          "page": "https://www.rimestat.us",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-29T20:31:37.377251634Z"
        },
        "updatedAt": "2026-10-29T20:41:25.616992818Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "OpenAI",
        "b": "Rime Labs",
        "name": "Vendor"
      },
      {
        "a": "https://api.openai.com/v1/realtime",
        "b": "wss://prism.api.rime.ai/v1/realtime",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "websocket",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT",
        "b": "Proprietary hosted service under Rime's terms. The Rime SDK used to call it (github.com/rimelabs/rime-sdk) is MIT.",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-07-28",
        "b": "2026-10-28",
        "name": "Last release"
      },
      {
        "a": "couldn't be read",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "couldn't be read",
        "b": "no date given",
        "name": "Privacy policy last updated"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "couldn't be read",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "couldn't be read",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "3.3/5 (4)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "OpenAI Realtime API scores 63.4 (B) on agent readiness against Rime Prism's 57.9 (C), and leads in 5 of 7 scored categories. Rime Prism leads on payments \u0026 pricing and maintenance \u0026 community.",
        "question": "Which is better for AI agents, OpenAI Realtime API or Rime Prism?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do OpenAI Realtime API and Rime Prism need an API key?"
      },
      {
        "answer": "Yes. OpenAI Realtime API has a hosted endpoint at https://api.openai.com/v1/realtime and Rime Prism at wss://prism.api.rime.ai/v1/realtime.",
        "question": "Can an agent call OpenAI Realtime API and Rime Prism without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 67 against 41",
          "Schema \u0026 documentation, 84 against 69",
          "Security \u0026 auth, 61 against 56"
        ],
        "also": null,
        "goodFor": "Teams building their own voice agent on one speech-to-speech model who want browser, server and phone transports from one vendor and can run a backend for secrets and tools.",
        "slug": "openai-realtime",
        "watchFor": "openai.com answered 403 to our reader, so the service terms, privacy policy, sub-processor list and security pages were not read."
      },
      {
        "aheadOn": [
          "Payments \u0026 pricing, 40 against 20",
          "Maintenance \u0026 community, 65 against 52"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "English voice agents on Rime's cloud that want one speech-to-speech model with their own tools, and teams moving an OpenAI Realtime beta client who can bridge phone audio themselves.",
        "slug": "rime-prism",
        "watchFor": "Rime's status page had no Prism component on launch day, and there is no incident history for it"
      }
    ],
    "job": {
      "capability": "voice.agent",
      "name": "Voice agents"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime.json",
        "title": "AssemblyAI Voice Agent API vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-rime-prism.json",
        "title": "AssemblyAI Voice Agent API vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bland-ai-vs-openai-realtime.json",
        "title": "Bland AI API + MCP vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/bland-ai-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bland-ai-vs-rime-prism.json",
        "title": "Bland AI API + MCP vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/bland-ai-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bolna-vs-openai-realtime.json",
        "title": "Bolna API + MCP vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/bolna-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bolna-vs-rime-prism.json",
        "title": "Bolna API + MCP vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/bolna-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime.json",
        "title": "Deepgram Voice Agent API vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-rime-prism.json",
        "title": "Deepgram Voice Agent API vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-openai-realtime.json",
        "title": "ElevenLabs Agents API + MCP vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-rime-prism.json",
        "title": "ElevenLabs Agents API + MCP vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-openai-realtime.json",
        "title": "Gemini Live API vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-rime-prism.json",
        "title": "Gemini Live API vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.json",
        "title": "Harmony.ai vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-rime-prism.json",
        "title": "Harmony.ai vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.json",
        "title": "Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-rime-prism.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-agents-vs-openai-realtime.json",
        "title": "LiveKit Agents vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/livekit-agents-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-agents-vs-rime-prism.json",
        "title": "LiveKit Agents vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/livekit-agents-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat.json",
        "title": "OpenAI Realtime API vs Pipecat",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-placecall.json",
        "title": "OpenAI Realtime API vs PlaceCall",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-placecall"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-retell-ai.json",
        "title": "OpenAI Realtime API vs Retell AI API + MCP",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-retell-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-synthflow.json",
        "title": "OpenAI Realtime API vs Synthflow API + MCP",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-synthflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox.json",
        "title": "OpenAI Realtime API vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-vapi.json",
        "title": "OpenAI Realtime API vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-vocily.json",
        "title": "OpenAI Realtime API vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-vogent.json",
        "title": "OpenAI Realtime API vs Vogent API",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-vogent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/pipecat-vs-rime-prism.json",
        "title": "Pipecat vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/pipecat-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/placecall-vs-rime-prism.json",
        "title": "PlaceCall vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/placecall-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/retell-ai-vs-rime-prism.json",
        "title": "Retell AI API + MCP vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/retell-ai-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rime-prism-vs-synthflow.json",
        "title": "Rime Prism vs Synthflow API + MCP",
        "url": "https://www.anchorterminal.com/compare/rime-prism-vs-synthflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rime-prism-vs-vocily.json",
        "title": "Rime Prism vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/rime-prism-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rime-prism-vs-vogent.json",
        "title": "Rime Prism vs Vogent API",
        "url": "https://www.anchorterminal.com/compare/rime-prism-vs-vogent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime.json",
        "title": "GPT-Live vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gpt-live-vs-rime-prism.json",
        "title": "GPT-Live vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/gpt-live-vs-rime-prism"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rime-prism-vs-ultravox.json",
        "title": "Rime Prism vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/rime-prism-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rime-prism-vs-vapi.json",
        "title": "Rime Prism vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/rime-prism-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.json",
        "title": "OpenAI Realtime API vs Pipecat PhoneLLM",
        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm"
      },
      {
        "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-rime-prism.json",
        "title": "Pipecat PhoneLLM vs Rime Prism",
        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-rime-prism"
      }
    ],
    "scores": [
      {
        "by": 26,
        "edge": "openai-realtime",
        "key": "reliability",
        "name": "Reliability",
        "openai-realtime": 67,
        "rime-prism": 41,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 15,
        "edge": "openai-realtime",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "openai-realtime": 84,
        "rime-prism": 69,
        "weight": 13
      },
      {
        "by": 3,
        "edge": "openai-realtime",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "openai-realtime": 76,
        "rime-prism": 73,
        "weight": 13
      },
      {
        "by": 5,
        "edge": "openai-realtime",
        "key": "security",
        "name": "Security \u0026 auth",
        "openai-realtime": 61,
        "rime-prism": 56,
        "weight": 14
      },
      {
        "by": 20,
        "edge": "rime-prism",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "openai-realtime": 20,
        "rime-prism": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 13,
        "edge": "rime-prism",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "openai-realtime": 52,
        "rime-prism": 65,
        "weight": 7
      },
      {
        "by": 2,
        "edge": "openai-realtime",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "openai-realtime": 72,
        "rime-prism": 70,
        "weight": 7
      }
    ],
    "summary": "OpenAI Realtime API scores 63.4 (B) on agent readiness against Rime Prism's 57.9 (C), and leads in 5 of 7 scored categories. Rime Prism leads on payments \u0026 pricing and maintenance \u0026 community. Both do voice agents.",
    "tutorials": [],
    "verdicts": {
      "openai-realtime": "A generally available speech-to-speech API with WebRTC, WebSocket and SIP transports, a public OpenAPI file that types its events, and per-token prices. Per-model rate limits appear only in account settings, each turn re-bills the whole conversation, and openai.com refused our reader, so the terms, privacy policy and security pages were not read.",
      "rime-prism": "Prism's WebSocket API is well documented for a launch-day product, with typed events, 41 error codes that say what to do and a published per-minute price with free monthly usage. It has no Prism component or history on Rime's status page, no published concurrency limit, alpha SDKs, English only, and no data-handling statement that covers caller audio."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/openai-realtime-vs-rime-prism",
    "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-rime-prism.json",
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    "slim": "https://www.anchorterminal.com/compare/openai-realtime-vs-rime-prism.min.md"
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  "markdown": "OpenAI Realtime API scores 63.4 (B) on agent readiness against Rime Prism's 57.9 (C), and leads in 5 of 7 scored categories. Rime Prism leads on payments \u0026 pricing and maintenance \u0026 community. Both do voice agents.\n\n- OpenAI Realtime API: grade B, 63.4/100, rank #457 of 1222. Markdown https://www.anchorterminal.com/tools/openai-realtime.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-realtime.json\n- Rime Prism: grade C, 57.9/100, rank #686 of 1222. Markdown https://www.anchorterminal.com/tools/rime-prism.md · JSON https://www.anchorterminal.com/api/v1/tools/rime-prism.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 423 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### OpenAI Realtime API (B)\n\nGood for: Teams building their own voice agent on one speech-to-speech model who want browser, server and phone transports from one vendor and can run a backend for secrets and tools.\n\nAhead on:\n- Reliability, 67 against 41\n- Schema \u0026 documentation, 84 against 69\n- Security \u0026 auth, 61 against 56\n\nWatch for: openai.com answered 403 to our reader, so the service terms, privacy policy, sub-processor list and security pages were not read.\n\n### Rime Prism (C)\n\nGood for: English voice agents on Rime's cloud that want one speech-to-speech model with their own tools, and teams moving an OpenAI Realtime beta client who can bridge phone audio themselves.\n\nAhead on:\n- Payments \u0026 pricing, 40 against 20\n- Maintenance \u0026 community, 65 against 52\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Rime's status page had no Prism component on launch day, and there is no incident history for it\n\n\n## Score by category\n\n| Category | Weight | OpenAI Realtime API | Rime Prism | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 67 | 41 | OpenAI Realtime API +26 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 69 | OpenAI Realtime API +15 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 73 | OpenAI Realtime API +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 61 | 56 | OpenAI Realtime API +5 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Rime Prism +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 52 | 65 | Rime Prism +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 70 | OpenAI Realtime API +2 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **63.4 · B** | **57.9 · C** | |\n\n## Facts side by side\n\n| Fact | OpenAI Realtime API | Rime Prism |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | OpenAI | Rime Labs |\n| Hosted endpoint | `https://api.openai.com/v1/realtime` | `wss://prism.api.rime.ai/v1/realtime` |\n| Transports | HTTP | websocket |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT | Proprietary hosted service under Rime's terms. The Rime SDK used to call it (github.com/rimelabs/rime-sdk) is MIT. |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-07-28 | 2026-10-28 |\n| Terms last updated | couldn't be read | no date given |\n| Privacy policy last updated | couldn't be read | no date given |\n| Customer content may train models | couldn't be read | not found in the text |\n| Terms restrict automated access | couldn't be read | not found in the text |\n| Terms restrict benchmarking | couldn't be read | yes |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | yes |\n| Agent reviews | 3.3/5 (4) | none |\n\n## Verdicts\n\n**OpenAI Realtime API.** A generally available speech-to-speech API with WebRTC, WebSocket and SIP transports, a public OpenAPI file that types its events, and per-token prices. Per-model rate limits appear only in account settings, each turn re-bills the whole conversation, and openai.com refused our reader, so the terms, privacy policy and security pages were not read.\n\n**Rime Prism.** Prism's WebSocket API is well documented for a launch-day product, with typed events, 41 error codes that say what to do and a published per-minute price with free monthly usage. It has no Prism component or history on Rime's status page, no published concurrency limit, alpha SDKs, English only, and no data-handling statement that covers caller audio.\n\n## Before you call either\n\n### OpenAI Realtime API\n\n1. Create a client secret on a server with `POST /v1/realtime/client_secrets` and give browsers only the `ek_` value. Never ship the API key.\n2. After a response with MCP calls finishes, send another `response.create`. The API does not create the follow-up response itself.\n3. Set `truncation` with a `retention_ratio` below 1 and `token_limits.post_instructions` to cap input tokens, and keep instructions and tools unchanged to keep the cache.\n4. On a WebSocket, stop playback on `input_audio_buffer.speech_started` and send `conversation.item.truncate` with `audio_end_ms`. WebRTC and SIP truncate on the server.\n5. Use `gpt-realtime-2.1` or `gpt-realtime-2.1-mini`. `gpt-realtime` and `gpt-realtime-mini` shut down on 20 January 2027.\n\n### Rime Prism\n\n1. Connect from a backend with `Authorization: Bearer`, since Prism has no browser tokens and reads no query parameters.\n2. Send `session.update` before any audio, or every append fails with `session_not_initialized`.\n3. Keep streaming audio, silence included, while Prism speaks, because it finds turn ends and interruptions from that audio.\n4. Ask for the continuation after each tool result, since Prism doesn't resume on its own, and never rerun a call with an unknown outcome.\n5. Pin the exact SDK version, because the SDKs are alpha and a new release can change the API.\n\n## Questions\n\n### Which is better for AI agents, OpenAI Realtime API or Rime Prism?\n\nOpenAI Realtime API scores 63.4 (B) on agent readiness against Rime Prism's 57.9 (C), and leads in 5 of 7 scored categories. Rime Prism leads on payments \u0026 pricing and maintenance \u0026 community.\n\n### Do OpenAI Realtime API and Rime Prism need an API key?\n\nBoth need an API key.\n\n### Can an agent call OpenAI Realtime API and Rime Prism without installing anything?\n\nYes. OpenAI Realtime API has a hosted endpoint at https://api.openai.com/v1/realtime and Rime Prism at wss://prism.api.rime.ai/v1/realtime.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/openai-realtime-vs-rime-prism.json, and with the fewest tokens: https://www.anchorterminal.com/compare/openai-realtime-vs-rime-prism.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"openai-realtime\", \"b\": \"rime-prism\"}`. From a terminal: `anchor compare openai-realtime rime-prism`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/openai-realtime.json and https://www.anchorterminal.com/api/v1/tools/rime-prism.json\n\n## Other comparisons with OpenAI Realtime API or Rime Prism\n\n- [AssemblyAI Voice Agent API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime.md)\n- [AssemblyAI Voice Agent API vs Rime Prism](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-rime-prism.md)\n- [Bland AI API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/bland-ai-vs-openai-realtime.md)\n- [Bland AI API + MCP vs Rime Prism](https://www.anchorterminal.com/compare/bland-ai-vs-rime-prism.md)\n- [Bolna API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/bolna-vs-openai-realtime.md)\n- [Bolna API + MCP vs Rime Prism](https://www.anchorterminal.com/compare/bolna-vs-rime-prism.md)\n- [Deepgram Voice Agent API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime.md)\n- [Deepgram Voice Agent API vs Rime Prism](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-rime-prism.md)\n- [ElevenLabs Agents API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-openai-realtime.md)\n- [ElevenLabs Agents API + MCP vs Rime Prism](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-rime-prism.md)\n- [Gemini Live API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/gemini-live-vs-openai-realtime.md)\n- [Gemini Live API vs Rime Prism](https://www.anchorterminal.com/compare/gemini-live-vs-rime-prism.md)\n- [Harmony.ai vs OpenAI Realtime API](https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.md)\n- [Harmony.ai vs Rime Prism](https://www.anchorterminal.com/compare/harmony-ai-vs-rime-prism.md)\n- [Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.md)\n- [Hume EVI (Empathic Voice Interface) vs Rime Prism](https://www.anchorterminal.com/compare/hume-evi-vs-rime-prism.md)\n- [LiveKit Agents vs OpenAI Realtime API](https://www.anchorterminal.com/compare/livekit-agents-vs-openai-realtime.md)\n- [LiveKit Agents vs Rime Prism](https://www.anchorterminal.com/compare/livekit-agents-vs-rime-prism.md)\n- [OpenAI Realtime API vs Pipecat](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat.md)\n- [OpenAI Realtime API vs PlaceCall](https://www.anchorterminal.com/compare/openai-realtime-vs-placecall.md)\n- [OpenAI Realtime API vs Retell AI API + MCP](https://www.anchorterminal.com/compare/openai-realtime-vs-retell-ai.md)\n- [OpenAI Realtime API vs Synthflow API + MCP](https://www.anchorterminal.com/compare/openai-realtime-vs-synthflow.md)\n- [OpenAI Realtime API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox.md)\n- [OpenAI Realtime API vs Vapi API + MCP](https://www.anchorterminal.com/compare/openai-realtime-vs-vapi.md)\n- [OpenAI Realtime API vs Vocily AI](https://www.anchorterminal.com/compare/openai-realtime-vs-vocily.md)\n- [OpenAI Realtime API vs Vogent API](https://www.anchorterminal.com/compare/openai-realtime-vs-vogent.md)\n- [Pipecat vs Rime Prism](https://www.anchorterminal.com/compare/pipecat-vs-rime-prism.md)\n- [PlaceCall vs Rime Prism](https://www.anchorterminal.com/compare/placecall-vs-rime-prism.md)\n- [Retell AI API + MCP vs Rime Prism](https://www.anchorterminal.com/compare/retell-ai-vs-rime-prism.md)\n- [Rime Prism vs Synthflow API + MCP](https://www.anchorterminal.com/compare/rime-prism-vs-synthflow.md)\n- [Rime Prism vs Vocily AI](https://www.anchorterminal.com/compare/rime-prism-vs-vocily.md)\n- [Rime Prism vs Vogent API](https://www.anchorterminal.com/compare/rime-prism-vs-vogent.md)\n- [GPT-Live vs OpenAI Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime.md)\n- [GPT-Live vs Rime Prism](https://www.anchorterminal.com/compare/gpt-live-vs-rime-prism.md)\n- [Rime Prism vs Ultravox Realtime API](https://www.anchorterminal.com/compare/rime-prism-vs-ultravox.md)\n- [Rime Prism vs Vapi API + MCP](https://www.anchorterminal.com/compare/rime-prism-vs-vapi.md)\n- [OpenAI Realtime API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.md)\n- [Pipecat PhoneLLM vs Rime Prism](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-rime-prism.md)\n",
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