surewhynot-app X402 API
The X402 API from surewhynot-app — 6 operation(s) for x402.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Quartermaster X402 API
version: 1.6.0
description: Small, reliable utility APIs for AI agents. Paid endpoints charge per call in USDC over the x402 protocol (HTTP 402 flow) - no accounts, no API keys. Free endpoints are open.
contact:
url: https://quartermaster.surewhynot.app
servers:
- url: https://quartermaster.surewhynot.app
tags:
- name: X402
paths:
/v1/x402/discover:
get:
summary: Search the Coinbase x402 Bazaar
parameters:
- name: query
in: query
required: true
description: Natural-language search
schema:
type: string
- name: limit
in: query
required: false
description: Max results (1-20)
schema:
type: integer
default: 10
responses:
'200':
description: Search results
content:
application/json:
schema:
type: object
'402':
description: Payment required
content:
application/json:
schema:
type: object
x-payment:
protocol: x402
price: $0.001
currency: USDC
note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
tags:
- X402
operationId: getV1X402Discover
x-operation-id-source: derived
/v1/x402/merchant:
get:
summary: List a merchant's x402 Bazaar resources
parameters:
- name: payTo
in: query
required: true
description: Merchant wallet address
schema:
type: string
- name: limit
in: query
required: false
description: Max results (1-50)
schema:
type: integer
default: 20
responses:
'200':
description: Listed resources
content:
application/json:
schema:
type: object
'400':
description: Invalid address
content:
application/json:
schema:
type: object
'402':
description: Payment required
content:
application/json:
schema:
type: object
x-payment:
protocol: x402
price: $0.001
currency: USDC
note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
tags:
- X402
operationId: getV1X402Merchant
x-operation-id-source: derived
/v1/x402/price-normalize:
get:
summary: Convert USDC between atomic units and human decimals
parameters:
- name: amount
in: query
required: true
description: Amount to convert
schema:
type: string
- name: decimals
in: query
required: false
description: Token decimals (USDC=6)
schema:
type: integer
default: 6
- name: direction
in: query
required: false
description: to-human (default) or to-atomic
schema:
type: string
enum:
- to-human
- to-atomic
responses:
'200':
description: Converted amount
content:
application/json:
schema:
type: object
'400':
description: Invalid input
content:
application/json:
schema:
type: object
'402':
description: Payment required
content:
application/json:
schema:
type: object
x-payment:
protocol: x402
price: $0.001
currency: USDC
note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
tags:
- X402
operationId: getV1X402PriceNormalize
x-operation-id-source: derived
/v1/x402/test-vector:
get:
summary: Example x402 payment requirements (free)
responses:
'200':
description: Annotated example 402 body
content:
application/json:
schema:
type: object
tags:
- X402
operationId: getV1X402TestVector
x-operation-id-source: derived
/v1/x402/inspect:
get:
summary: Inspect and lint any x402 paid endpoint's payment challenge
description: Decodes the 402 payment requirements, names the network and asset, and flags misconfigurations including missing Bazaar discovery metadata.
parameters:
- name: url
in: query
required: true
description: x402 endpoint to inspect
schema:
type: string
format: uri
responses:
'200':
description: Inspection report
content:
application/json:
schema:
type: object
'400':
description: Invalid input
content:
application/json:
schema:
type: object
'402':
description: Payment required
content:
application/json:
schema:
type: object
x-payment:
protocol: x402
price: $0.002
currency: USDC
note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
tags:
- X402
operationId: getV1X402Inspect
x-operation-id-source: derived
/v1/x402/simulate:
get:
summary: 'Pre-flight an x402 payment: cost per rail and affordability'
description: Decodes an endpoint's 402 challenge, reports the price on every rail it offers (Base and Solana) and the cheapest, and — with an optional payer address — verifies the wallet can afford the call on Base.
parameters:
- name: url
in: query
required: true
description: The x402 endpoint to pre-flight
schema:
type: string
format: uri
- name: address
in: query
required: false
description: Optional payer wallet (0x…) for a Base affordability check
schema:
type: string
responses:
'200':
description: Simulation report
content:
application/json:
schema:
type: object
'400':
description: Invalid input
content:
application/json:
schema:
type: object
'402':
description: Payment required
content:
application/json:
schema:
type: object
x-payment:
protocol: x402
price: $0.003
currency: USDC
note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
tags:
- X402
operationId: getV1X402Simulate
x-operation-id-source: derived
externalDocs:
description: 'Buyer quickstart: how to pay with x402'
url: https://quartermaster.surewhynot.app/buyers