# Retell AI

**Canonical:** https://apis.io/providers/retell-ai/  
**Website:** https://www.retellai.com/  
**APIs profiled:** 78

Retell AI provides voice AI infrastructure for building conversational agents with low-latency turn detection, interruption handling, tool calling, knowledge bases, and conversation flows. The Retell SDK exposes a published OpenAPI spec covering agents, calls, voices, knowledge bases, conversation flows, batches, and chat agents.

## Kin Score — 31.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.6).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 60.7 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 33.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (78)

- **Retell AI Add Community Voice API** — The Add Community Voice API from Retell AI — 1 operation(s) for add community voice.
- **Retell AI Add Knowledge Base Sources API** — The Add Knowledge Base Sources API from Retell AI — 1 operation(s) for add knowledge base sources.
- **Retell AI Agent Playground Completion API** — The Agent Playground Completion API from Retell AI — 1 operation(s) for agent playground completion.
- **Retell AI Clone Voice API** — The Clone Voice API from Retell AI — 1 operation(s) for clone voice.
- **Retell AI Create Agent API** — The Create Agent API from Retell AI — 1 operation(s) for create agent.
- **Retell AI Create Agent Version API** — The Create Agent Version API from Retell AI — 1 operation(s) for create agent version.
- **Retell AI Create Batch Call API** — The Create Batch Call API from Retell AI — 1 operation(s) for create batch call.
- **Retell AI Create Batch Test API** — The Create Batch Test API from Retell AI — 1 operation(s) for create batch test.
- **Retell AI Create Chat Agent API** — The Create Chat Agent API from Retell AI — 1 operation(s) for create chat agent.
- **Retell AI Create Chat API** — The Create Chat API from Retell AI — 1 operation(s) for create chat.
- **Retell AI Create Chat Completion API** — The Create Chat Completion API from Retell AI — 1 operation(s) for create chat completion.
- **Retell AI Create Conversation Flow API** — The Create Conversation Flow API from Retell AI — 1 operation(s) for create conversation flow.
- **Retell AI Create Conversation Flow Component API** — The Create Conversation Flow Component API from Retell AI — 1 operation(s) for create conversation flow component.
- **Retell AI Create Knowledge Base API** — The Create Knowledge Base API from Retell AI — 1 operation(s) for create knowledge base.
- **Retell AI Create Phone Call API** — The Create Phone Call API from Retell AI — 1 operation(s) for create phone call.
- **Retell AI Create Phone Number API** — The Create Phone Number API from Retell AI — 1 operation(s) for create phone number.
- **Retell AI Create Retell Llm API** — The Create Retell Llm API from Retell AI — 1 operation(s) for create retell llm.
- **Retell AI Create Sms Chat API** — The Create Sms Chat API from Retell AI — 1 operation(s) for create sms chat.
- **Retell AI Create Test Case Definition API** — The Create Test Case Definition API from Retell AI — 1 operation(s) for create test case definition.
- **Retell AI Create Web Call API** — The Create Web Call API from Retell AI — 1 operation(s) for create web call.
- **Retell AI Delete Agent API** — The Delete Agent API from Retell AI — 1 operation(s) for delete agent.
- **Retell AI Delete Agent Version API** — The Delete Agent Version API from Retell AI — 1 operation(s) for delete agent version.
- **Retell AI Delete Call API** — The Delete Call API from Retell AI — 1 operation(s) for delete call.
- **Retell AI Delete Chat Agent API** — The Delete Chat Agent API from Retell AI — 1 operation(s) for delete chat agent.
- **Retell AI Delete Conversation Flow API** — The Delete Conversation Flow API from Retell AI — 1 operation(s) for delete conversation flow.
- **Retell AI Delete Conversation Flow Component API** — The Delete Conversation Flow Component API from Retell AI — 1 operation(s) for delete conversation flow component.
- **Retell AI Delete Knowledge Base API** — The Delete Knowledge Base API from Retell AI — 1 operation(s) for delete knowledge base.
- **Retell AI Delete Knowledge Base Source API** — The Delete Knowledge Base Source API from Retell AI — 1 operation(s) for delete knowledge base source.
- **Retell AI Delete Phone Number API** — The Delete Phone Number API from Retell AI — 1 operation(s) for delete phone number.
- **Retell AI Delete Retell Llm API** — The Delete Retell Llm API from Retell AI — 1 operation(s) for delete retell llm.
- **Retell AI Delete Test Case Definition API** — The Delete Test Case Definition API from Retell AI — 1 operation(s) for delete test case definition.
- **Retell AI End Chat API** — The End Chat API from Retell AI — 1 operation(s) for end chat.
- **Retell AI Get Agent API** — The Get Agent API from Retell AI — 1 operation(s) for get agent.
- **Retell AI Get Agent Versions API** — The Get Agent Versions API from Retell AI — 1 operation(s) for get agent versions.
- **Retell AI Get Batch Test API** — The Get Batch Test API from Retell AI — 1 operation(s) for get batch test.
- **Retell AI Get Call API** — The Get Call API from Retell AI — 1 operation(s) for get call.
- **Retell AI Get Chat Agent API** — The Get Chat Agent API from Retell AI — 1 operation(s) for get chat agent.
- **Retell AI Get Chat Agent Versions API** — The Get Chat Agent Versions API from Retell AI — 1 operation(s) for get chat agent versions.
- **Retell AI Get Chat API** — The Get Chat API from Retell AI — 1 operation(s) for get chat.
- **Retell AI Get Concurrency API** — The Get Concurrency API from Retell AI — 1 operation(s) for get concurrency.
- …and 38 more, listed in full on the page.

## Agentic access (1)

- **Retell Ai Agentic Access** — 86 operations · 49 acting · 1 human-in-the-loop

## Security (2)

- **Retell Ai Authentication** — http · 1 scheme
- **Retell Ai Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Retell Ai Plans Pricing**

## Tags

Artificial Intelligence, Voice, Agents, Real-Time, Conversational

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/retell-ai/). Scores are computed from the provider's own public artifacts under a published rubric.