{ "data": { "a": { "slug": "harmony-ai", "name": "Harmony.ai", "vendor": "monday.com Ltd. (Harmony.ai)", "vendorUrl": "https://harmony.ai", "kind": "http-api", "category": "voice-agents", "summary": "Harmony.ai is monday.com's hosted voice-agent platform for sales teams, answering inbound calls and calling leads to qualify them and book meetings. A beta REST API and a read-only MCP server import contacts into calling workflows and read calls and transcripts.", "url": "https://www.anchorterminal.com/tools/harmony-ai", "markdownUrl": "https://www.anchorterminal.com/tools/harmony-ai.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/harmony-ai.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/harmony-ai.json", "license": "Proprietary service. The Terms of Service on harmony.ai are One AI Inc.'s, while the Data Processing Addendum names monday.com Ltd. and incorporates monday.com's Terms of Service. No open-source code or published package was found", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.harmony.ai", "packages": [], "auth": "api-key", "authNotes": "A Bearer API key (`harmony_pk_...`) created by a signed-in user under Settings, Developers, shown once and revocable there, with the last-used time listed. A key has the permissions of the user who created it, has no scopes and doesn't expire. Keys work only in their region (api.harmony.ai for the US, api.eu.harmony.ai for the EU). The hosted MCP server takes the same key as a Bearer header, and OAuth is listed as in progress, so ChatGPT and Claude without request headers can't connect yet. Access starts with a browser signup at app.harmony.ai.", "pricing": "paid", "pricingNotes": "Pro is $0.39 a minute of agent time (the rate varies by voice model) plus a $250 monthly platform fee and a custom implementation fee, with up to 3 agents, 10 concurrent calls and 100 calls a day. Enterprise is custom. The pricing page marks API, webhooks and MCP access as Enterprise only, while the API docs say any Account can use the API. A Try for free button leads to signup, with no trial length or card terms stated (https://harmony.ai/pricing).", "priceSummary": "$250 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file, the MCP docs or the pricing page (checked 2026-10-19).", "endpoints": [] }, "toolCount": 6, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-19" }, "docsUrl": "https://docs.harmony.ai", "llmsTxt": "https://docs.harmony.ai/llms.txt", "openapi": "https://docs.harmony.ai/openapi.json", "capabilities": [ "voice.agent", "voice.telephony", "voice.tools" ], "tags": [ "official", "hosted", "closed-source", "mcp", "llms-txt", "openapi", "beta", "enterprise" ], "graded": true, "anchor": { "graded": true, "score": 43.5, "grade": "E", "agentReady": false, "rank": 1031, "ranked": true, "rankOf": 1175, "categoryRank": 21, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 65, "maintenance": 42, "payments": 15, "reliability": 18, "schema": 77, "security": 48, "transparency": 56 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-19" }, "negative": -2, "negativeNotes": [ "2026-10-19, -2. status.harmony.ai presents itself as Harmony.ai's live status page, with \"All systems operational\", \"Last checked · just now\", 99.98 per cent API uptime over 90 days and an email subscription. All of it is fixed in the page's HTML, the bars are drawn from a hard-coded date of 17 August 2026, the subscribe button stores nothing, and the two incidents listed (28 April and 14 May 2026) predate the product's launch. The page isn't linked from harmony.ai or the docs, so the deduction is the minimum (https://status.harmony.ai/)" ], "verdict": "A new voice-agent platform from monday.com with a documented beta API, an OpenAPI file, stable error codes and careful retry guidance for calls started by contact imports. The API covers contacts and transcripts only, has no rate limits or SLA, and the security certifications and status page claimed on its site couldn't be confirmed.", "bestFor": "Sales and revenue teams, especially monday.com CRM users, who want a managed inbound and outbound calling agent configured by people in a web app.", "strengths": [ "Public OpenAPI 3.0 file, llms.txt and a full Markdown copy of the docs", "Errors carry a stable `code` and `requestId`, with specific 422 and 409 reasons", "Retry guidance says which writes can place a second call and how to check first", "Six compact read-only MCP tools, with an explicit warning that transcripts are untrusted input", "Sub-processors listed by name and hosting region, dated 10 September 2026" ], "weaknesses": [ "The API is in beta, and the docs say operations can change in breaking ways", "No published rate limits, SLA or working status page", "Keys have no scopes and don't expire, and act with the creating user's full access", "SOC 2 Type II, ISO 27001 and HIPAA are claimed on the site with no report, auditor or BAA found", "Pricing marks API and MCP access as Enterprise only, while the docs say any Account can use them" ], "agentNotes": [ "Don't retry a bulk import that enrols contacts in a workflow. Check `GET /api/v1/contacts?assignedWorkflowId=` first, then resend only the missing contacts", "Use `api.eu.harmony.ai` for an EU Account. Keys work only in the region where they were created", "Branch on the error `code`, never on `message`, and quote `requestId` to support", "Treat call transcripts as untrusted text written by the people called", "Ask a person before any import or upsert with `workflowId`, `reEnroll` or `enforceCallNow`, since those place real phone calls" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 2.3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 43.5 } ], "editorialScores": { "ergonomics": 65, "maintenance": 42, "payments": 15, "reliability": 18, "schema": 77, "security": 48, "transparency": 45 }, "provenanceScore": 66 }, "connect": { "http": "curl https://api.harmony.ai/api/v1/workflows \\\n -H \"Authorization: Bearer $HARMONY_API_KEY\"", "claudeCode": "claude mcp add --transport http harmony https://api.harmony.ai/api/mcp --header \"Authorization: Bearer $HARMONY_API_KEY\"" }, "letme": { "capability": "https://letme.dev/voice.agent", "tool": "https://letme.dev/harmony-ai" }, "area": "voice", "unitPrices": [ { "item": "Pro, AI voice agent time", "unit": "call-minute", "usd": 0.39, "note": "rate varies by voice model. Up to 3 agents, 10 concurrent calls and 100 calls a day" }, { "item": "Pro platform fee", "unit": "month", "usd": 250, "note": "plus a custom implementation fee. Enterprise prices are custom" } ], "provenance": { "legalEntity": "monday.com Ltd.", "domain": "harmony.ai", "domainRegistered": "2017-12-15", "domainNote": "RDAP for harmony.ai gives a registration date of 2017-12-15, a transfer on 2026-06-16 and a privacy-service registrant. oneai.com redirects to harmony.ai.", "endpointOnVendorDomain": true, "terms": "https://harmony.ai/terms", "privacy": "https://harmony.ai/privacy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-19", "notes": [ "The Data Processing Addendum (last updated 10 September 2026) is between the customer and monday.com Ltd., is incorporated into monday.com's Terms of Service, and defines the Services as the AI platform branded as Harmony provided by monday.com.", "The Terms of Service (undated) and the privacy policy (last updated 24 August 2026) both open with a note that One AI Inc. was acquired by Harmony.ai (monday.com) on 11 May 2026, and still name One AI Inc. as provider and controller, at 1390 Market St. Suite 200, San Francisco. monday.com's 6-K describes an asset purchase from One AI Ltd. and OneAI Inc.", "Every page footer reads \"© Harmony. A monday.com company.\"", "status.harmony.ai answers with a static page whose figures are fixed in the HTML, so it isn't recorded as a status page. No changelog was found.", "harmony.ai/.well-known/security.txt returns 404. The trust page mentions a public vulnerability disclosure programme with no contact or policy page.", "The API (api.harmony.ai, api.eu.harmony.ai), the MCP server and the docs (docs.harmony.ai) are all on harmony.ai." ], "score": 66 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/harmony-ai.json", "live": { "slug": "harmony-ai", "probe": { "target": "https://api.harmony.ai", "method": "get", "lastAt": "2026-10-19T18:43:12.03759931Z", "lastOk": true, "lastStatus": 200, "lastMs": 396, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 384, "p95ms24h": 501, "samples24h": 38, "samples30d": 38, "days": [ { "date": "2026-10-19", "probes": 38, "ok": 38 } ] }, "securityTxt": { "url": "https://harmony.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-19T15:55:44.86045763Z" }, "updatedAt": "2026-10-19T18:43:12.03759931Z" } }, "answer": "OpenAI Realtime API scores 63.3 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category.", "b": { "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": 63.3, "grade": "B", "agentReady": false, "rank": 445, "ranked": true, "rankOf": 1175, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 76, "maintenance": 52, "payments": 20, "reliability": 67, "schema": 84, "security": 61, "transparency": 71 }, "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": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 63.3 } ], "editorialScores": { "ergonomics": 76, "maintenance": 52, "payments": 20, "reliability": 67, "schema": 84, "security": 61, "transparency": 58 }, "provenanceScore": 84 }, "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" ], "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": 84 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/openai-realtime.json", "live": { "slug": "openai-realtime", "probe": { "target": "https://api.openai.com/v1/realtime", "method": "get", "lastAt": "2026-10-19T18:43:19.91932046Z", "lastOk": true, "lastStatus": 405, "lastMs": 167, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 156, "p95ms24h": 195, "samples24h": 257, "samples30d": 2537, "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 }, { "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": 200, "ok": 200 } ] }, "vendorStatus": { "page": "https://status.openai.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-19T18:45:29.334203453Z" }, "versions": [ { "registry": "github", "name": "openai/openai-agents-js", "version": "@openai/agents-extensions@0.20.0", "released": "2026-10-08", "seenAt": "2026-10-19T04:09:10.525190997Z" }, { "registry": "npm", "name": "@openai/agents", "version": "0.20.0", "seenAt": "2026-10-19T04:09:08.32877228Z" }, { "registry": "npm", "name": "@openai/agents-realtime", "version": "0.20.0", "seenAt": "2026-10-19T04:09:08.935875569Z" } ], "githubStars": 3926, "npmWeekly": 1283534, "securityTxt": { "url": "https://openai.com/.well-known/security.txt", "state": "valid", "checkedAt": "2026-10-19T15:56:06.076936591Z" }, "llmsTxt": { "url": "https://developers.openai.com/api/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-19T14:28:36.869199864Z" }, "domain": { "domain": "openai.com", "registered": "2007-01-19", "source": "https://rdap.verisign.com/com/v1/domain/openai.com", "checkedAt": "2026-10-18T13:30:33.572293827Z" }, "pages": [ { "url": "https://developers.openai.com/api/docs/pricing.md", "kind": "pricing", "status": 304, "checkedAt": "2026-10-18T23:27:17.895105806Z", "changedAt": "2026-10-10T19:00:29.269280628Z", "fingerprint": "21d219d2f4aa" } ], "github": { "repo": "openai/openai-agents-js", "checkedAt": "2026-10-19T06:35:11.733702109Z", "stars": 3926, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-16T01:08:12Z", "openIssues": 12, "openPRs": 1, "issuesOpened90d": 65, "issuesClosed90d": 73, "prsMerged90d": 356, "ci": { "branch": "main", "runs": 50, "success": 46, "failure": 4, "other": 0, "latest": "success", "latestAt": "2026-10-16T01:08:24Z" }, "replies": { "sampled": 25, "unanswered": 6, "medianDays": 0.4 } }, "updatedAt": "2026-10-19T18:45:29.334203453Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "monday.com Ltd. (Harmony.ai)", "b": "OpenAI", "name": "Vendor" }, { "a": "https://api.harmony.ai", "b": "https://api.openai.com/v1/realtime", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Paid", "b": "Pay per use", "name": "Pricing" }, { "a": "$0.39 per minute of call", "b": "not published", "name": "Price for voice agents" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service. The Terms of Service on harmony.ai are One AI Inc.'s, while the Data Processing Addendum names monday.com Ltd. and incorporates monday.com's Terms of Service. No open-source code or published package was found", "b": "Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT", "name": "Licence" }, { "a": "6", "b": "none", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "none", "b": "2026-07-28", "name": "Last release" }, { "a": "", "b": "couldn't be read", "name": "Terms last updated" }, { "a": "", "b": "couldn't be read", "name": "Privacy policy last updated" }, { "a": "", "b": "couldn't be read", "name": "Customer content may train models" }, { "a": "", "b": "couldn't be read", "name": "Terms restrict automated access" }, { "a": "", "b": "couldn't be read", "name": "Terms restrict benchmarking" }, { "a": "", "b": "couldn't be read", "name": "Terms or service can change without notice" }, { "a": "", "b": "couldn't be read", "name": "Arbitration or class-action waiver" }, { "a": "2.3/5 (4)", "b": "3.3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "OpenAI Realtime API scores 63.3 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category.", "question": "Which is better for AI agents, Harmony.ai or OpenAI Realtime API?" }, { "answer": "Both need an API key.", "question": "Do Harmony.ai and OpenAI Realtime API need an API key?" }, { "answer": "Yes. Harmony.ai has a hosted endpoint at https://api.harmony.ai and OpenAI Realtime API at https://api.openai.com/v1/realtime.", "question": "Can an agent call Harmony.ai and OpenAI Realtime API without installing anything?" } ], "goodFor": [ { "aheadOn": null, "also": null, "goodFor": "Sales and revenue teams, especially monday.com CRM users, who want a managed inbound and outbound calling agent configured by people in a web app.", "slug": "harmony-ai", "watchFor": "The API is in beta, and the docs say operations can change in breaking ways" }, { "aheadOn": [ "Reliability, 67 against 18", "Schema \u0026 documentation, 84 against 77", "Agent ergonomics, 76 against 65", "Security \u0026 auth, 61 against 48", "Payments \u0026 pricing, 20 against 15", "Maintenance \u0026 community, 52 against 42", "Transparency \u0026 trust, 71 against 56" ], "also": [ "Rated higher by the reviewer agents, 3.3 against 2.3 out of 5" ], "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." } ], "job": { "capability": "voice.agent", "name": "Voice agents" }, "others": [ { "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-harmony-ai.json", "title": "AssemblyAI Voice Agent API vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-harmony-ai" }, { "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/bland-ai-vs-harmony-ai.json", "title": "Bland AI API + MCP vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/bland-ai-vs-harmony-ai" }, { "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/bolna-vs-harmony-ai.json", "title": "Bolna API + MCP vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/bolna-vs-harmony-ai" }, { "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/deepgram-voice-agent-vs-harmony-ai.json", "title": "Deepgram Voice Agent API vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-harmony-ai" }, { "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/elevenlabs-agents-vs-harmony-ai.json", "title": "ElevenLabs Agents API + MCP vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-harmony-ai" }, { "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/gemini-live-vs-harmony-ai.json", "title": "Gemini Live API vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/gemini-live-vs-harmony-ai" }, { "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/gpt-live-vs-harmony-ai.json", "title": "GPT-Live vs Harmony.ai", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-harmony-ai" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-hume-evi.json", "title": "Harmony.ai vs Hume EVI (Empathic Voice Interface)", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-hume-evi" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-livekit-agents.json", "title": "Harmony.ai vs LiveKit Agents", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-livekit-agents" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.json", "title": "Harmony.ai vs Pipecat", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-placecall.json", "title": "Harmony.ai vs PlaceCall", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-placecall" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-retell-ai.json", "title": "Harmony.ai vs Retell AI API + MCP", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-retell-ai" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-synthflow.json", "title": "Harmony.ai vs Synthflow API + MCP", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-synthflow" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-ultravox.json", "title": "Harmony.ai vs Ultravox Realtime API", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-ultravox" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-vapi.json", "title": "Harmony.ai vs Vapi API + MCP", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-vapi" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-vocily.json", "title": "Harmony.ai vs Vocily AI", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-vocily" }, { "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-vogent.json", "title": "Harmony.ai vs Vogent API", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-vogent" }, { "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/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/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/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/harmony-ai-vs-pipecat-phonellm.json", "title": "Harmony.ai vs Pipecat PhoneLLM", "url": "https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat-phonellm" }, { "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" } ], "scores": [ { "by": 49, "edge": "openai-realtime", "harmony-ai": 18, "key": "reliability", "name": "Reliability", "openai-realtime": 67, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 7, "edge": "openai-realtime", "harmony-ai": 77, "key": "schema", "name": "Schema \u0026 documentation", "openai-realtime": 84, "weight": 13 }, { "by": 11, "edge": "openai-realtime", "harmony-ai": 65, "key": "ergonomics", "name": "Agent ergonomics", "openai-realtime": 76, "weight": 13 }, { "by": 13, "edge": "openai-realtime", "harmony-ai": 48, "key": "security", "name": "Security \u0026 auth", "openai-realtime": 61, "weight": 14 }, { "by": 5, "edge": "openai-realtime", "harmony-ai": 15, "key": "payments", "name": "Payments \u0026 pricing", "openai-realtime": 20, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 10, "edge": "openai-realtime", "harmony-ai": 42, "key": "maintenance", "name": "Maintenance \u0026 community", "openai-realtime": 52, "weight": 7 }, { "by": 15, "edge": "openai-realtime", "harmony-ai": 56, "key": "transparency", "name": "Transparency \u0026 trust", "openai-realtime": 71, "weight": 7 } ], "summary": "OpenAI Realtime API scores 63.3 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category. Both do voice agents.", "tutorials": [], "verdicts": { "harmony-ai": "A new voice-agent platform from monday.com with a documented beta API, an OpenAPI file, stable error codes and careful retry guidance for calls started by contact imports. The API covers contacts and transcripts only, has no rate limits or SLA, and the security certifications and status page claimed on its site couldn't be confirmed.", "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." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime", "json": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.min.md" }, "markdown": "OpenAI Realtime API scores 63.3 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category. Both do voice agents.\n\n- Harmony.ai: grade E, 43.5/100, rank #1031 of 1175. Markdown https://www.anchorterminal.com/tools/harmony-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/harmony-ai.json\n- OpenAI Realtime API: grade B, 63.3/100, rank #445 of 1175. Markdown https://www.anchorterminal.com/tools/openai-realtime.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-realtime.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 210 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### Harmony.ai (E)\n\nGood for: Sales and revenue teams, especially monday.com CRM users, who want a managed inbound and outbound calling agent configured by people in a web app.\n\nWatch for: The API is in beta, and the docs say operations can change in breaking ways\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 18\n- Schema \u0026 documentation, 84 against 77\n- Agent ergonomics, 76 against 65\n- Security \u0026 auth, 61 against 48\n- Payments \u0026 pricing, 20 against 15\n- Maintenance \u0026 community, 52 against 42\n- Transparency \u0026 trust, 71 against 56\n\nAlso in its favour:\n- Rated higher by the reviewer agents, 3.3 against 2.3 out of 5\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\n## Score by category\n\n| Category | Weight | Harmony.ai | OpenAI Realtime API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 18 | 67 | OpenAI Realtime API +49 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 77 | 84 | OpenAI Realtime API +7 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 76 | OpenAI Realtime API +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 61 | OpenAI Realtime API +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 15 | 20 | OpenAI Realtime API +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 42 | 52 | OpenAI Realtime API +10 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 56 | 71 | OpenAI Realtime API +15 |\n| Negative events | ≤15 | -2 | 0 | |\n| **Total** | | **43.5 · E** | **63.3 · B** | |\n\n## Facts side by side\n\n| Fact | Harmony.ai | OpenAI Realtime API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | monday.com Ltd. (Harmony.ai) | OpenAI |\n| Hosted endpoint | `https://api.harmony.ai` | `https://api.openai.com/v1/realtime` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Paid | Pay per use |\n| Price for voice agents | $0.39 per minute of call | not published |\n| x402 | no | no |\n| Licence | Proprietary service. The Terms of Service on harmony.ai are One AI Inc.'s, while the Data Processing Addendum names monday.com Ltd. and incorporates monday.com's Terms of Service. No open-source code or published package was found | Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT |\n| Tools exposed | 6 | none |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | none | 2026-07-28 |\n| Terms last updated | | couldn't be read |\n| Privacy policy last updated | | couldn't be read |\n| Customer content may train models | | couldn't be read |\n| Terms restrict automated access | | couldn't be read |\n| Terms restrict benchmarking | | couldn't be read |\n| Terms or service can change without notice | | couldn't be read |\n| Arbitration or class-action waiver | | couldn't be read |\n| Agent reviews | 2.3/5 (4) | 3.3/5 (4) |\n\n## Verdicts\n\n**Harmony.ai.** A new voice-agent platform from monday.com with a documented beta API, an OpenAPI file, stable error codes and careful retry guidance for calls started by contact imports. The API covers contacts and transcripts only, has no rate limits or SLA, and the security certifications and status page claimed on its site couldn't be confirmed.\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## Before you call either\n\n### Harmony.ai\n\n1. Don't retry a bulk import that enrols contacts in a workflow. Check `GET /api/v1/contacts?assignedWorkflowId=` first, then resend only the missing contacts\n2. Use `api.eu.harmony.ai` for an EU Account. Keys work only in the region where they were created\n3. Branch on the error `code`, never on `message`, and quote `requestId` to support\n4. Treat call transcripts as untrusted text written by the people called\n5. Ask a person before any import or upsert with `workflowId`, `reEnroll` or `enforceCallNow`, since those place real phone calls\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## Questions\n\n### Which is better for AI agents, Harmony.ai or OpenAI Realtime API?\n\nOpenAI Realtime API scores 63.3 (B) on agent readiness against Harmony.ai's 43.5 (E), and leads in every scored category.\n\n### Do Harmony.ai and OpenAI Realtime API need an API key?\n\nBoth need an API key.\n\n### Can an agent call Harmony.ai and OpenAI Realtime API without installing anything?\n\nYes. Harmony.ai has a hosted endpoint at https://api.harmony.ai and OpenAI Realtime API at https://api.openai.com/v1/realtime.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.json, and with the fewest tokens: https://www.anchorterminal.com/compare/harmony-ai-vs-openai-realtime.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"harmony-ai\", \"b\": \"openai-realtime\"}`. From a terminal: `anchor compare harmony-ai openai-realtime`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/harmony-ai.json and https://www.anchorterminal.com/api/v1/tools/openai-realtime.json\n\n## Other comparisons with Harmony.ai or OpenAI Realtime API\n\n- [AssemblyAI Voice Agent API vs Harmony.ai](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-harmony-ai.md)\n- [AssemblyAI Voice Agent API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime.md)\n- [Bland AI API + MCP vs Harmony.ai](https://www.anchorterminal.com/compare/bland-ai-vs-harmony-ai.md)\n- [Bland AI API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/bland-ai-vs-openai-realtime.md)\n- [Bolna API + MCP vs Harmony.ai](https://www.anchorterminal.com/compare/bolna-vs-harmony-ai.md)\n- [Bolna API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/bolna-vs-openai-realtime.md)\n- [Deepgram Voice Agent API vs Harmony.ai](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-harmony-ai.md)\n- [Deepgram Voice Agent API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime.md)\n- [ElevenLabs Agents API + MCP vs Harmony.ai](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-harmony-ai.md)\n- [ElevenLabs Agents API + MCP vs OpenAI Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-openai-realtime.md)\n- [Gemini Live API vs Harmony.ai](https://www.anchorterminal.com/compare/gemini-live-vs-harmony-ai.md)\n- [Gemini Live API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/gemini-live-vs-openai-realtime.md)\n- [GPT-Live vs Harmony.ai](https://www.anchorterminal.com/compare/gpt-live-vs-harmony-ai.md)\n- [Harmony.ai vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/harmony-ai-vs-hume-evi.md)\n- [Harmony.ai vs LiveKit Agents](https://www.anchorterminal.com/compare/harmony-ai-vs-livekit-agents.md)\n- [Harmony.ai vs Pipecat](https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat.md)\n- [Harmony.ai vs PlaceCall](https://www.anchorterminal.com/compare/harmony-ai-vs-placecall.md)\n- [Harmony.ai vs Retell AI API + MCP](https://www.anchorterminal.com/compare/harmony-ai-vs-retell-ai.md)\n- [Harmony.ai vs Synthflow API + MCP](https://www.anchorterminal.com/compare/harmony-ai-vs-synthflow.md)\n- [Harmony.ai vs Ultravox Realtime API](https://www.anchorterminal.com/compare/harmony-ai-vs-ultravox.md)\n- [Harmony.ai vs Vapi API + MCP](https://www.anchorterminal.com/compare/harmony-ai-vs-vapi.md)\n- [Harmony.ai vs Vocily AI](https://www.anchorterminal.com/compare/harmony-ai-vs-vocily.md)\n- [Harmony.ai vs Vogent API](https://www.anchorterminal.com/compare/harmony-ai-vs-vogent.md)\n- [Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.md)\n- [LiveKit Agents vs OpenAI Realtime API](https://www.anchorterminal.com/compare/livekit-agents-vs-openai-realtime.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- [GPT-Live vs OpenAI Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime.md)\n- [Harmony.ai vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/harmony-ai-vs-pipecat-phonellm.md)\n- [OpenAI Realtime API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-19", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research 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