How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Retell AI Update Call API

The Update Call API from Retell AI — 1 operation(s) for update call.

Retell AI Update Call API is one of 78 APIs that Retell AI publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.

Tagged areas include Update Call. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an AsyncAPI specification, and pricing.

This API exposes 1 operation across 1 path, and defines 14 schemas. It is described by OpenAPI 3.2.0, at version 3.0.0.

Requests are made against a single base URL, https://api.retellai.com.

1 operations 1 paths 14 schemas 1 PATCH

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
3.0.0
Base URL
https://api.retellai.com
Authentication
HTTP Bearer
License
Resource Areas
1

Authentication & Security 1

Retell AI Update Call API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (string) (api_key). By default, every request must be authenticated.

  • api_key — Authentication header containing API key (find it in dashboard). The format is "Bearer YOURAPIKEY"

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 PATCH. Each is listed below with its method, path, parameters, and response codes.

Update Call 1
PATCH
/v2/update-call/{call_id}
Update metadata and sensitive data storage settings for an existing call.
updateCallMetadata 1 param body → 200400401422500

Schemas 14

The contract defines 14 schemas that model the data the API accepts and returns. The most detailed are V2CallBase (31 properties), CallLatency (8 properties), NodeTransitionUtterance (6 properties), ToolCallInvocationUtterance (5 properties). Each schema is shown below with its type and property counts.

V2WebCallResponse
DisconnectionReason
string
V2CallBase
object
31 properties 4 required
UtteranceOrToolCall
CallAnalysis
object
5 properties
ToolCallInvocationUtterance
object
5 properties 4 required
CallLatency
object
8 properties
ProductCost
object
4 properties 2 required
Utterance
object
3 properties 3 required
DTMFUtterance
object
2 properties 2 required
ToolCallResultUtterance
object
4 properties 3 required
NodeTransitionUtterance
object
6 properties 5 required
V2PhoneCallResponse
V2CallResponse

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

retell-ai-update-call-api-openapi.yml Raw ↑

Other APIs Retell AI publishes across the network.

Retell AI Add Community Voice API
Retell AI Add Knowledge Base Sources API
Retell AI Agent Playground Completion API
Retell AI Clone Voice API
Retell AI Create Agent API
Retell AI Create Agent Version API
Retell AI Create Batch Call API
Retell AI Create Batch Test API
Retell AI Create Chat Agent API
Retell AI Create Chat API
Retell AI Create Chat Completion API
Retell AI Create Conversation Flow API
Where this information came from

This is an independent, third-party profile of Retell AI Update Call API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.