Stream a call's live events

GET

/calls/{id}/events

import MoreVoice from "@morevoice/sdk";

const mv = new MoreVoice(); // MOREVOICE_API_KEY from the environment

for await (const event of mv.calls.stream("call_7Hk2Lm9Qp")) {
  console.log(event.type, event.data.object);
}

import os

import httpx

url = "https://api.morevoice.ai/v1/calls/call_7Hk2Lm9Qp/events"
headers = {"Authorization": f"Bearer {os.environ['MOREVOICE_API_KEY']}", "Accept": "text/event-stream"}
with httpx.stream("GET", url, headers=headers, timeout=None) as response:
    response.raise_for_status()
    for line in response.iter_lines():
        if line.startswith("data:"):
            print(line[5:].strip())

Server-Sent Events for one call: call.state_changed, transcript.partial, transcript.final, call.tool_called, and call.ended, after which the stream closes. The stream starts with what already happened on the call. Reconnect with Last-Event-ID (EventSource does it for you) to get only what you missed. An ended call’s stream sends call.ended at once. A call that has not started yet (a web call before the browser connects) is a 404: subscribe once it starts, or follow it on GET /v1/events/stream. Counts against the key’s stream limit (concurrency_limit, limit_type: api_streams).

Try it in the API playground with a test-mode key.

Authorizations

bearerAuth

Parameters

Path Parameters

required

string

<= 200 characters /^call_[0-9A-Za-z]+$/

A call ID (call_…).

Query Parameters

types

Any of:

string
Array<string>

string

Only these event types (comma-separated or repeated): call.state_changed, transcript.partial, transcript.final, call.tool_called, call.ended, transcript.*, call.* or *. Default: all of them.

last_event_id

string

>= 1 characters <= 200 characters

Resume after this event, for clients that cannot send the Last-Event-ID header (the header wins when both are sent).

Header Parameters

MoreVoice-Version

string

/^\d{4}-\d{2}-\d{2}$/

The API version to use for this request. Defaults to the version the API key is pinned to.

Example

2026-11-01

Responses

200

The event stream.

text/event-stream

A text/event-stream. Each frame is id: <call_…>:<n>, event: <type> and one data: line with the event envelope (id, object: "event", type, created, api_version, livemode, org_id, data.object). Comment lines (: ping) keep the connection alive every 15 s. The stream ends after call.ended.

string

400

The request is invalid: a parameter is missing, malformed or unknown, or the version header is unknown.

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "parameter_missing",
    "doc_url": "https://docs.morevoice.ai/api/errors#parameter-missing",
    "message": "Missing required parameter: to.",
    "param": "to",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "invalid_request_error"
  }
}

Headers

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.

401

No valid API key was sent.

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "invalid_api_key",
    "doc_url": "https://docs.morevoice.ai/api/errors#invalid-api-key",
    "message": "Invalid API key.",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "authentication_error"
  }
}

Headers

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.

403

The key may not do this (a missing scope, a plan limit, or a compliance block).

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "missing_scope",
    "doc_url": "https://docs.morevoice.ai/api/errors#missing-scope",
    "message": "This API key lacks the calls:write scope.",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "permission_error"
  }
}

Headers

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.

404

No object with this ID exists in this organisation and mode.

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "resource_missing",
    "doc_url": "https://docs.morevoice.ai/api/errors#resource-missing",
    "message": "No such object: 'call_4Gk2'.",
    "param": "id",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "not_found"
  }
}

Headers

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.

429

Too many requests, or no call capacity right now. Retry after the Retry-After delay.

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "rate_limited",
    "doc_url": "https://docs.morevoice.ai/api/errors#rate-limited",
    "message": "Too many requests. Retry after 1 second.",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "rate_limit_error"
  }
}

Headers

Retry-After

integer

Seconds to wait before retrying.

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.

500

Something went wrong on MoreVoice’s side. Retry with the same Idempotency-Key.

application/json

Every /v1 error.

object

error

required

object

code

required

A stable, machine-readable code from the error-code catalogue.

string

details

Structured context, e.g. required_scope or the compliance verdict.

object

key

additional properties

doc_url

required

A link to the documentation of this code.

string

message

required

A human-readable explanation. Do not parse it.

string

param

The request parameter the error relates to, e.g. to or metadata[order_id].

string

request_id

required

The X-Request-Id of this request. Quote it when you contact support.

string

type

required

The category of the error.

string

Allowed values: invalid_request_error authentication_error permission_error not_found conflict rate_limit_error compliance_error idempotency_error api_error

Example

{
  "error": {
    "code": "internal_error",
    "doc_url": "https://docs.morevoice.ai/api/errors#internal-error",
    "message": "Something went wrong on MoreVoice's side.",
    "request_id": "req_7Hk2LmN9pQ4rS6tV8wX0yZ",
    "type": "api_error"
  }
}

Headers

X-Request-Id

string

The request’s ID (req_…). Quote it when you contact support.