openapi: 3.1.0
info:
  title: Curl HTTP Request
  description: Send an HTTP request to any URL from our servers and receive the full response — including the status code,
    all response headers, and the body content. Supports GET, POST, PUT, PATCH, DELETE, and HEAD. Automatically follows up
    to 3 redirects. Useful for testing endpoints, verifying servers are responding correctly, debugging redirect chains, or
    fetching raw data without needing a local setup.
  version: 1.0.0
  contact:
    name: _done
    url: https://forms.gle/5KzuSFH7p8hHtDmz7
    email: info@underscoredone.com
  x-openapi-url: https://curl-http-request.underscoredone.com/openapi.json
  x-logo:
    url: https://underscoredone.com/logo.png
    altText: _done
  x-guidance: Send a JSON body with a 'url' (required, must start with http:// or https://) and an optional 'method' field
    (defaults to GET). The response includes 'statusCode' (integer), 'headers' (object of key-value strings), 'body' (string,
    may be HTML, JSON, or plain text), 'durationMs' (how long the request took in milliseconds), and 'error' (null on success,
    or a plain-English message if the request could not be completed). Do not use this for private or internal network addresses.
    Redirects are followed automatically up to 3 times. If the target server is unreachable or times out, a 400 error is returned
    with a description of what went wrong.
  x-ai-instructions: Send a JSON body with a 'url' (required, must start with http:// or https://) and an optional 'method'
    field (defaults to GET). The response includes 'statusCode' (integer), 'headers' (object of key-value strings), 'body'
    (string, may be HTML, JSON, or plain text), 'durationMs' (how long the request took in milliseconds), and 'error' (null
    on success, or a plain-English message if the request could not be completed). Do not use this for private or internal
    network addresses. Redirects are followed automatically up to 3 times. If the target server is unreachable or times out,
    a 400 error is returned with a description of what went wrong.
  x-provider: _done — single-purpose utility APIs for developers and AI agents. Pay per call with USDC on Base Mainnet or
    Solana Mainnet.
  x-pricing:
    model: pay-per-call
    currency: USDC
    network: Base Mainnet or Solana Mainnet
    price: $0.01
  x-keywords:
  - network
  - curl
  - http request
  - fetch url
  - check endpoint
  - status code
  - response headers
  - redirect follow
  - api tester
  - debug server
  - utility
  - api
  - ai-agent
  - pay-per-call
  - usdc
  - x402
  x-category: http request
  x-provider-url: https://underscoredone.com
  x-agentcash-auth:
    mode: paid
  x-402:
    price: $0.01
    network: eip155:8453
    asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    pay_to: '0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08'
    facilitator: https://api.cdp.coinbase.com/platform/v2/x402
    scheme: exact
    description: Send an HTTP request to any URL from our servers and receive the full response — including the status code,
      all response headers, and the body content. Supports GET, POST, PUT, PATCH, DELETE, and HEAD. Automatically follows
      up to 3 redirects. Useful for testing endpoints, verifying servers are responding correctly, debugging redirect chains,
      or fetching raw data without needing a local setup.
    mime_type: application/json
    networks:
    - network: eip155:8453
      asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      pay_to: '0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08'
    - network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
      asset: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
      pay_to: 8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b
paths:
  /curl:
    post:
      tags:
      - http request
      - curl
      - fetch url
      - make http request
      - http client
      - api testing
      - send http request
      - rest client
      - get post request
      - follow redirects
      - http get
      - web request
      - fetch raw response
      - test endpoint
      - http fetch
      summary: Fetch any URL from the cloud and return its full response.
      description: Send an HTTP request to the given web address from our servers and return the full response including status,
        headers, and body.
      operationId: handler_curl_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Request'
        required: true
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Response'
              examples:
                success:
                  summary: Successful response
                  value:
                    api_version: 1.0.0
                    url: https://httpbin.org/get
                    method: GET
                    statusCode: 200
                    headers:
                      content-type: application/json
                      content-length: '307'
                      server: gunicorn/19.9.0
                    body: "{\n  \"args\": {}, \n  \"headers\": {\n    \"Host\": \"httpbin.org\"\n  }, \n  \"url\": \"https://httpbin.org/get\"\
                      \n}"
                    durationMs: 312
                    redirectChain: []
                    error: null
        '422':
          description: Unprocessable — a required field is missing or the wrong type. Check the detail field for specifics.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: array
        '402':
          description: Payment required. Send a signed USDC payment on Base Mainnet or Solana Mainnet using the x402 protocol.
          headers:
            X-Payment-Response:
              description: x402 payment challenge — base64-encoded JSON with payment details.
              schema:
                type: string
        '400':
          description: Bad request — your input failed validation or could not be processed. Check the detail field for specifics.
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
      x-ai-instructions: Send a JSON body with a 'url' (required, must start with http:// or https://) and an optional 'method'
        field (defaults to GET). The response includes 'statusCode' (integer), 'headers' (object of key-value strings), 'body'
        (string, may be HTML, JSON, or plain text), 'durationMs' (how long the request took in milliseconds), and 'error'
        (null on success, or a plain-English message if the request could not be completed). Do not use this for private or
        internal network addresses. Redirects are followed automatically up to 3 times. If the target server is unreachable
        or times out, a 400 error is returned with a description of what went wrong.
      x-guidance: Send a JSON body with a 'url' (required, must start with http:// or https://) and an optional 'method' field
        (defaults to GET). The response includes 'statusCode' (integer), 'headers' (object of key-value strings), 'body' (string,
        may be HTML, JSON, or plain text), 'durationMs' (how long the request took in milliseconds), and 'error' (null on
        success, or a plain-English message if the request could not be completed). Do not use this for private or internal
        network addresses. Redirects are followed automatically up to 3 times. If the target server is unreachable or times
        out, a 400 error is returned with a description of what went wrong.
      x-payment-info:
        price:
          fixed:
            mode: fixed
            currency: USD
            amount: '0.01'
        protocols:
        - x402: {}
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    Request:
      properties:
        url:
          type: string
          maxLength: 8192
          title: Url
          description: The full web address you want to send a request to. Must start with http:// or https://.
        method:
          type: string
          title: Method
          description: The type of request to make. Choose from GET, POST, PUT, PATCH, DELETE, or HEAD. Defaults to GET if
            not provided.
          default: GET
      type: object
      required:
      - url
      title: Request
      example:
        method: GET
        url: https://httpbin.org/get
    Response:
      properties:
        api_version:
          type: string
          title: Api Version
          description: API version
          default: 1.0.0
        url:
          type: string
          title: Url
          description: The web address that was requested.
        method:
          type: string
          title: Method
          description: The request type that was used.
        statusCode:
          type: integer
          title: Statuscode
          description: The numeric status code returned by the server (for example, 200 means success, 404 means not found).
        headers:
          additionalProperties:
            type: string
          type: object
          title: Headers
          description: All the response headers sent back by the server, as key-value pairs.
        body:
          type: string
          title: Body
          description: The full text body returned by the server. May be HTML, JSON, plain text, or empty for HEAD requests.
        durationMs:
          type: integer
          title: Durationms
          description: How long the request took in milliseconds from start to finish.
        redirectChain:
          items:
            type: string
          type: array
          title: Redirectchain
          description: The list of URLs visited during any automatic redirects, from the first address through to the final
            destination.
        error:
          anyOf:
          - type: string
          - type: 'null'
          title: Error
          description: Null if the request succeeded. A plain-English description of what went wrong if the request could
            not be completed.
      type: object
      required:
      - url
      - method
      - statusCode
      - headers
      - body
      - durationMs
      - redirectChain
      title: Response
      example:
        api_version: 1.0.0
        body: "{\n  \"args\": {}, \n  \"url\": \"https://httpbin.org/get\"\n}"
        durationMs: 312
        headers:
          content-length: '307'
          content-type: application/json
          server: gunicorn/19.9.0
        method: GET
        redirectChain: []
        statusCode: 200
        url: https://httpbin.org/get
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
  securitySchemes:
    siwx:
      type: apiKey
      in: header
      name: SIGN-IN-WITH-X
      description: CAIP-122 wallet signature for repeat access after payment
servers:
- url: https://curl-http-request.underscoredone.com
  description: Production
tags:
- name: http request
- name: curl
- name: fetch url
- name: make http request
- name: http client
- name: api testing
- name: send http request
- name: rest client
- name: get post request
- name: follow redirects
- name: http get
- name: web request
- name: fetch raw response
- name: test endpoint
- name: http fetch
x402Version: 2
x-payment-accepts:
- scheme: exact
  network: eip155:8453
  payTo: '0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08'
  asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
- scheme: exact
  network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
  payTo: 8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b
  asset: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v