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How Retell AI’s scores are calculated

The full audit trail, recomputed from the verdict data at build time through the same code that produced the leaderboard: verdict × quality × story weight per cell, cells sum to dimension scores, dimensions blend into the PA Score. Every number on the product page is reproducible from this page alone; for why the formula looks like this, see the methodology.

verdict factors: full ×1.0 · partial ×0.6 · disputed ×0.3 · none ×0.0 · n/a excluded from both sides · cell points = weight × quality × factor · cell max = weight × 10

PA Score35/100

Agent-ready 74.5 × 0.30 = 22.35

API quality 3.4 × 0.20 = 0.68

Openness 16.0 × 0.20 = 3.20

Built-in AI 37.6 × 0.15 = 5.64

Automation 22.5 × 0.15 = 3.38

(22.35 + 0.68 + 3.20 + 5.64 + 3.38) ÷ (0.30 + 0.20 + 0.20 + 0.15 + 0.15) = 35.24 ÷ 1.00 = 35.2

Scores are stored to 1 decimal; the product page’s pills round to whole numbers for display. Each dimension below shows the stories, verdicts, and cited evidence behind its number.

Agent-ready74.5/100×0.30 of the PA blend

Outside-in: can YOUR agent reach and drive this product — API, MCP, CLI, headless runs, agent docs.

Point an agent at llms.txt or agent-oriented docsweight 2

2 (weight) × 9 (quality) × 1.0 (full) = 18.0 of 20 max

  • [probe] https://docs.retellai.com/llms.txt“PROBE llms.txt: HTTP 200 at https://docs.retellai.com/llms.txt # Retell AI > Explore Retell AI docs to learn how to build, test, deploy, and optimize AI voice agents with APIs, integ”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”

Run the product headlessly / in CI for automationweight 2

2 (weight) × 7 (quality) × 0.6 (partial) = 8.4 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“The Retell CLI lets you manage Retell resources from your terminal.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Retell provides official SDKs for Node.js and Python to simplify integration with our platform.”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”
  • [probe] https://docs.retellai.com/get-started/cli“official CLI documented at https://docs.retellai.com/get-started/cli”

Plug MCP servers into this product so it can use their toolsweight 3

3 (weight) × 8 (quality) × 1.0 (full) = 24.0 of 30 max

  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/mcp.md“Connect a Retell single- or multi-prompt agent to a remote MCP server so it can call the server's tools during a live voice or chat conversation.”
  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/mcp.md“Connect your single- or multi-prompt agent to a remote Model Context Protocol (MCP) server, and the agent can call that server's tools during a live call.”
  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/mcp.md“Connect your single- or multi-prompt agent to a remote [Model Context Protocol (MCP)] server, and the agent can call that server's tools during a live call.”
  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/function-calling.md“Function calling transforms your AI agent from a conversational interface into an action-oriented assistant.”

Connect an agent via an official MCP serverweight 3

3 (weight) × 9 (quality) × 1.0 (full) = 27.0 of 30 max

  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Retell supports the Model Context Protocol (MCP) so you can build Retell AI voice agents directly from MCP-capable clients (Cursor, Claude Desktop, Claude Code, Codex-style tools, and more).”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Retell supports the [Model Context Protocol (MCP)] so you can build Retell AI voice agents directly from MCP-capable clients (Cursor, Claude Desktop, Claude Code, Codex-style tools, and more).”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Agents: create, update, publish, list, and fetch agent versions.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“official MCP server documented at https://docs.retellai.com/get-started/mcp-server”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”

Use an official CLIweight 2

2 (weight) × 9 (quality) × 1.0 (full) = 18.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“The Retell CLI lets you manage Retell resources from your terminal.”
  • [probe] https://docs.retellai.com/get-started/cli“official CLI documented at https://docs.retellai.com/get-started/cli”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”

Drive the product through a documented public APIweight 3

3 (weight) × 9 (quality) × 1.0 (full) = 27.0 of 30 max

  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Retell provides official SDKs for Node.js and Python to simplify integration with our platform.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Type safety: Full TypeScript support with autocomplete ... Error handling: Structured error responses with detailed messages”
  • [probe] https://docs.retellai.com/get-started/mcp-server“official MCP server documented at https://docs.retellai.com/get-started/mcp-server”
  • [probe] https://docs.retellai.com/get-started/cli“official CLI documented at https://docs.retellai.com/get-started/cli”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”
  • [probe] https://docs.retellai.com/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.retellai.com/openapi.json, https://docs.retellai.com/swagger.json, https://docs.retellai.com/api/openapi.json, https://docs.retellai.com/.well-known/openapi.json)”

Issue scoped/least-privilege API credentials for an agentweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Retell provides official SDKs for Node.js and Python to simplify integration with our platform.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”

Build against official SDKsweight 2

2 (weight) × 9 (quality) × 1.0 (full) = 18.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Retell provides official SDKs for Node.js and Python to simplify integration with our platform.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Type safety: Full TypeScript support with autocomplete ... Error handling: Structured error responses with detailed messages”
  • [probe] https://docs.retellai.com/get-started/cli“official CLI documented at https://docs.retellai.com/get-started/cli”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“official MCP server documented at https://docs.retellai.com/get-started/mcp-server”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”

Subscribe to events via webhooksweight 2

2 (weight) × 8 (quality) × 1.0 (full) = 16.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“Webhooks allow your application to receive real-time notifications about events that occur in your Retell AI account.”
  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“webhooks push data to your application as events happen, making your integrations more efficient and responsive.”

Agent-ready = 156.4 ÷ 210 × 100 = 74.5

API quality3.4/100×0.20 of the PA blend

The programmable surface once an agent is there — machine-readable spec, interactive docs, sandbox, versioning discipline.

Explore an interactive API reference with runnable examplesweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/api-references/clone-voice.md“Clone a voice from audio files”
  • [probe] https://docs.retellai.com/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.retellai.com/openapi.json, https://docs.retellai.com/swagger.json, https://docs.retellai.com/api/openapi.json, https://docs.retellai.com/.well-known/openapi.json)”

Download a machine-readable API spec (OpenAPI or equivalent)weight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [probe] https://docs.retellai.com/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.retellai.com/openapi.json, https://docs.retellai.com/swagger.json, https://docs.retellai.com/api/openapi.json, https://docs.retellai.com/.well-known/openapi.json)”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”

Test against a sandbox environment without touching production dataweight 1

1 (weight) × 4 (quality) × 0.6 (partial) = 2.4 of 10 max

  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“Click the "Test" button to start a web call with your agent... This step is free and doesn't need a phone number or payment method.”
  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“Click the "Test" button to start a web call with your agent”
  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“New accounts start with \$10 in free trial credits, no payment method required.”

Rely on versioned APIs with a documented deprecation policyweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

API quality = 2.4 ÷ 70 × 100 = 3.4

Openness16.0/100×0.20 of the PA blend

Can you leave, inspect, or self-host — data export, open source, portability.

Do everything through the API that I can do in the UIweight 2

2 (weight) × 8 (quality) × 1.0 (full) = 16.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Retell supports the Model Context Protocol (MCP) so you can build Retell AI voice agents directly from MCP-capable clients (Cursor, Claude Desktop, Claude Code, Codex-style tools, and more).”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”
  • [probe] https://docs.retellai.com/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.retellai.com/openapi.json, https://docs.retellai.com/swagger.json, https://docs.retellai.com/api/openapi.json, https://docs.retellai.com/.well-known/openapi.json)”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Agents: create, update, publish, list, and fetch agent versions.”

Export all of my data in open formats and leaveweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://docs.retellai.com/accounts/data-retention.md“Configure per-agent data retention to automatically delete call and chat data — transcripts, recordings, and logs — after a set period for compliance.”
  • [claimed-docs] https://docs.retellai.com/accounts/data-retention.md“Retell allows you to configure a data retention period per agent. After the retention period expires, call and chat data associated with that agent is automatically and permanently deleted.”
  • [claimed-docs] https://docs.retellai.com/accounts/data-retention.md“Retell allows you to configure a data retention period per agent.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Retell provides official SDKs for Node.js and Python to simplify integration with our platform.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”

Read the product's source under an open licenseweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Self-host the core productweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://www.retellai.com/pricing“Retell starts at $0, pay only for what you use.”
  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“Build your first Retell AI phone agent in 15 minutes: create an account, pick a template, test in the dashboard, deploy to a phone number, and make a call.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”
  • [claimed-docs] https://docs.retellai.com/deploy/custom-telephony.md“Integrate Retell voice agents with your own telephony provider using elastic SIP trunking or imported numbers from Twilio, Telnyx, and Vonage.”

Openness = 16.0 ÷ 100 × 100 = 16.0

Built-in AI37.6/100×0.15 of the PA blend

Inside-out: how agentic the product itself is for its users — built-in assistants, autonomous features.

Get AI-generated insights and suggestions from my data inside the productweight 2

2 (weight) × 6 (quality) × 0.6 (partial) = 7.2 of 20 max

  • [claimed-docs] https://docs.retellai.com/ai-qa/overview.md“AI QA scores Retell calls on hallucination, knowledge base accuracy, latency, sentiment, and tool usage to surface quality trends and issues.”
  • [claimed-docs] https://docs.retellai.com/ai-qa/overview.md“AI QA automatically evaluates a sampled set of your calls against rules and metrics you configure.”
  • [claimed-docs] https://docs.retellai.com/features/analytics-dashboard.md“Build custom Retell analytics dashboards to track call and chat metrics like success rate, latency, cost, and concurrency, with charts, filters, and breakdowns.”
  • [claimed-docs] https://docs.retellai.com/features/analytics-dashboard.md“The Analytics dashboard charts your call and chat data so you can see how your agents are performing over time.”
  • [claimed-docs] https://docs.retellai.com“Built-in call success and sentiment scoring, plus custom fields synced to your CRM.”

Set up automations that run autonomously in the backgroundweight 2

2 (weight) × 6 (quality) × 0.6 (partial) = 7.2 of 20 max

  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/function-calling.md“Function calling lets Retell single or multi-prompt agents take real actions — transfer calls, end calls, book appointments, send SMS, and call external APIs.”
  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/function-calling.md“Function calling transforms your AI agent from a conversational interface into an action-oriented assistant.”
  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“Webhooks allow your application to receive real-time notifications about events that occur in your Retell AI account.”
  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“webhooks push data to your application as events happen, making your integrations more efficient and responsive.”
  • [community] https://news.ycombinator.com/item?id=39453402“The AI contradicted itself when layering conditionals - it got confused about morning vs afternoon time, kept asking to repeat despite correct answers being given.”
  • [community] https://news.ycombinator.com/item?id=39453402“Voice sounds great, but: told it unavailable until next year, it confirmed Feb 4th 'next year' but thought current year was 2022. Also got stuck in a loop saying 'let me double check your records' then falsely claimed disconnection.”

Delegate tasks to a built-in AI assistant inside the productweight 3

3 (weight) × 3 (quality) × 0.6 (partial) = 5.4 of 30 max

  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“click **Generate from prompt** (marked Suggested) to let [Conductor](/conductor/create-agent) draft an agent from a plain-English description of your use case”

Operate the product with natural-language commandsweight 2

2 (weight) × 7 (quality) × 1.0 (full) = 14.0 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/quick-start.md“click **Generate from prompt** (marked Suggested) to let [Conductor](/conductor/create-agent) draft an agent from a plain-English description of your use case”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Retell supports the Model Context Protocol (MCP) so you can build Retell AI voice agents directly from MCP-capable clients (Cursor, Claude Desktop, Claude Code, Codex-style tools, and more).”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Retell supports the [Model Context Protocol (MCP)] so you can build Retell AI voice agents directly from MCP-capable clients (Cursor, Claude Desktop, Claude Code, Codex-style tools, and more).”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Agents: create, update, publish, list, and fetch agent versions.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“official MCP server documented at https://docs.retellai.com/get-started/mcp-server”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”

Built-in AI = 33.8 ÷ 90 × 100 = 37.6

Automation22.5/100×0.15 of the PA blend

Depth of automation primitives — rules, scheduling, bulk operations, webhooks.

Perform bulk operations across many items at onceweight 2

2 (weight) × 4 (quality) × 0.6 (partial) = 4.8 of 20 max

  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/sdk.md“Official Retell SDKs for Node.js and Python. Typed clients with API key auth, structured errors, and full voice and chat endpoint coverage.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”
  • [probe] https://docs.retellai.com/get-started/cli“PROBE runtime (recorded 2026-09-05): `npx -y @retell-ai/retell-cli --version` printed `retell 0.13.0 (OpenAPI 3.0.0, catalog v4)` keylessly — the official npm CLI installs and runs without an account.”
  • [probe] https://docs.retellai.com/get-started/mcp-server“PROBE runtime (recorded 2026-09-05): the hosted MCP server at https://mcp.retellai.com completed a full KEYLESS JSON-RPC initialize handshake, answering serverInfo {"name":"retell-sdk","version":"3.0.0"} with instructions describing its three meta-tools (list_api_endpoints, get_api_endpoint_schema, invoke_api_endpoint) — the entire Retell API is agent-reachable through MCP, with the API key only needed at tool-call time.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Agents: create, update, publish, list, and fetch agent versions.”

Define rules that trigger actions automatically on eventsweight 3

3 (weight) × 6 (quality) × 0.6 (partial) = 10.8 of 30 max

  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/function-calling.md“Function calling lets Retell single or multi-prompt agents take real actions — transfer calls, end calls, book appointments, send SMS, and call external APIs.”
  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“Webhooks allow your application to receive real-time notifications about events that occur in your Retell AI account.”
  • [claimed-docs] https://docs.retellai.com/features/webhook-overview.md“webhooks push data to your application as events happen, making your integrations more efficient and responsive.”
  • [claimed-docs] https://docs.retellai.com“Drag-and-drop, node-based flows for structured, high-stakes calls.”
  • [claimed-docs] https://docs.retellai.com/build/single-multi-prompt/function-calling.md“Function calling transforms your AI agent from a conversational interface into an action-oriented assistant.”
  • [claimed-docs] https://docs.retellai.com/ai-qa/overview.md“AI QA automatically evaluates a sampled set of your calls against rules and metrics you configure.”

Schedule recurring jobs or workflowsweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Version, review, and roll back my automationsweight 1

1 (weight) × 4 (quality) × 0.6 (partial) = 2.4 of 10 max

  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Agents: create, update, publish, list, and fetch agent versions.”
  • [claimed-docs] https://docs.retellai.com/get-started/cli.md“Install the Retell CLI to manage agents, phone numbers, knowledge bases, and other Retell resources from your terminal with simple commands.”
  • [claimed-docs] https://docs.retellai.com/get-started/mcp-server.md“Use Retell's MCP server to build and manage voice agents from MCP-capable clients like Cursor, Claude Desktop, and Claude Code via Retell APIs.”

Automation = 18.0 ÷ 80 × 100 = 22.5