Cloudflare Messages API

Send, pull, and acknowledge messages.

Documentation GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /accounts/{account_id}/queues/{queue_id}/messages Send a single message to a queue · Cloudflare Send Message #

Ask an LLM

“How do I publish one message onto a Cloudflare Queue over HTTP?”

“Can I set the content type of a message I put on a queue?”

Tell an agent

Send the message {body} to queue {queue} in account {account}.

Put one {content_type} message {body} on queue {queue} in account {account}.

POST /accounts/{account_id}/queues/{queue_id}/messages/batch Send a batch of messages to a queue · Cloudflare Send Message Batch #

Ask an LLM

“Can I push many messages onto a queue in one request?”

“What's the way to enqueue a list of messages at once instead of one by one?”

Tell an agent

Send these messages {messages} to queue {queue} in account {account} as a batch.

Enqueue the batch {messages} on queue {queue} in account {account}.

POST /accounts/{account_id}/queues/{queue_id}/messages/pull Pull messages from a queue for processing · Cloudflare Pull Messages #

Ask an LLM

“How do I consume messages from a queue with an HTTP pull consumer?”

“Can I hide pulled messages from other consumers while I process them?”

Tell an agent

Pull up to {batch_size} messages from queue {queue} in account {account}.

Pull messages from queue {queue} in account {account} and keep them hidden for {visibility_timeout_ms} ms.

POST /accounts/{account_id}/queues/{queue_id}/messages/ack Acknowledge or retry pulled queue messages · Cloudflare Acknowledge Messages #

Ask an LLM

“How do I mark pulled queue messages as done so they're removed?”

“Can I send some pulled messages back for retry instead of acknowledging them?”

Tell an agent destructive · confirm first

Acknowledge messages {acks} on queue {queue} in account {account}.

Ack {acks} and retry {retries} on queue {queue} in account {account}.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/cloudflare:cloudflare-messages-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Cloudflare Queues Messages API
  description: The Cloudflare Queues API enables developers to create and manage message queues that integrate with Cloudflare Workers. Queues support guaranteed delivery, work offloading from requests, worker-to-worker communication, and data buffering and batching. The API provides endpoints for queue management, consumer configuration, message operations, and purging.
  version: '4.0'
  contact:
    name: Cloudflare Support
    url: https://support.cloudflare.com/
  termsOfService: https://www.cloudflare.com/terms/
servers:
- url: https://api.cloudflare.com/client/v4
  description: Cloudflare API v4 Production Server
security:
- bearerAuth: []
tags:
- name: Messages
  description: Send, pull, and acknowledge messages.
paths:
  /accounts/{account_id}/queues/{queue_id}/messages:
    post:
      operationId: sendMessage
      summary: Cloudflare Send Message
      description: Send a single message to the queue.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/AccountId'
      - $ref: '#/components/parameters/QueueId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/MessageInput'
            examples:
              SendmessageRequestExample:
                summary: Default sendMessage request
                x-microcks-default: true
                value:
                  body: example_value
                  content_type: json
      responses:
        '200':
          description: Message sent successfully.
        '401':
          description: Unauthorized.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /accounts/{account_id}/queues/{queue_id}/messages/batch:
    post:
      operationId: sendMessageBatch
      summary: Cloudflare Send Message Batch
      description: Send multiple messages to the queue in a single request.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/AccountId'
      - $ref: '#/components/parameters/QueueId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                messages:
                  type: array
                  items:
                    $ref: '#/components/schemas/MessageInput'
            examples:
              SendmessagebatchRequestExample:
                summary: Default sendMessageBatch request
                x-microcks-default: true
                value:
                  messages:
                  - body: example_value
                    content_type: json
      responses:
        '200':
          description: Messages sent successfully.
        '401':
          description: Unauthorized.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /accounts/{account_id}/queues/{queue_id}/messages/pull:
    post:
      operationId: pullMessages
      summary: Cloudflare Pull Messages
      description: Retrieve a batch of messages from the queue for processing.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/AccountId'
      - $ref: '#/components/parameters/QueueId'
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                visibility_timeout_ms:
                  type: integer
                  description: How long the pulled messages should be invisible to other consumers, in milliseconds.
                batch_size:
                  type: integer
                  description: Maximum number of messages to pull.
            examples:
              PullmessagesRequestExample:
                summary: Default pullMessages request
                x-microcks-default: true
                value:
                  visibility_timeout_ms: 10
                  batch_size: 10
      responses:
        '200':
          description: Messages pulled successfully.
        '401':
          description: Unauthorized.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /accounts/{account_id}/queues/{queue_id}/messages/ack:
    post:
      operationId: ackMessages
      summary: Cloudflare Acknowledge Messages
      description: Acknowledge and optionally retry messages from the queue. Acknowledged messages are permanently removed from the queue.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/AccountId'
      - $ref: '#/components/parameters/QueueId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                acks:
                  type: array
                  items:
                    type: object
                    properties:
                      lease_id:
                        type: string
                        description: The lease ID from the pulled message.
                retries:
                  type: array
                  items:
                    type: object
                    properties:
                      lease_id:
                        type: string
                        description: The lease ID of the message to retry.
                      delay_seconds:
                        type: integer
                        description: Delay before the message becomes visible again.
            examples:
              AckmessagesRequestExample:
                summary: Default ackMessages request
                x-microcks-default: true
                value:
                  acks:
                  - lease_id: '500123'
                  retries:
                  - lease_id: '500123'
                    delay_seconds: 10
      responses:
        '200':
          description: Messages acknowledged successfully.
        '401':
          description: Unauthorized.
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    MessageInput:
      type: object
      properties:
        body:
          description: The message body content.
          example: example_value
        content_type:
          type: string
          description: The content type of the message body.
          enum:
          - json
          - text
          - bytes
          example: json
  parameters:
    AccountId:
      name: account_id
      in: path
      required: true
      description: The unique identifier of the Cloudflare account.
      schema:
        type: string
    QueueId:
      name: queue_id
      in: path
      required: true
      description: The unique identifier of the queue.
      schema:
        type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API token with Queues permissions.
externalDocs:
  description: Cloudflare Queues API Documentation
  url: https://developers.cloudflare.com/api/resources/queues/
x-provenance:
  method: harvested
  publisher: Cloudflare
  source: https://developers.cloudflare.com/openapi.json
  note: split by refine-openapis from the provider's own published document, verified by fetch (openapi/_original/*.fetch.json);
    stamped by stamp-openapi-provenance.py (roadmap#793)

Cloudflare Messages API

Operations 4

Documentation

Specifications

Schemas & Data

Other Resources

Work with this as data

MCP server

Tools for apis

Call it yourself

Get an API key

OpenAPI Specification