One request.
A world of resources.

Utility, data and AI APIs your software can pay for. Discover a resource, read its price and authorize a payment in USDC on Base.

Browse APIs OpenAPI schema
Base Base networkUSDC Stablecoin settlementView public activity

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Resource index

21 resources

GET/x402/ping

Health check ping

Utility
0.005 USDCper request
GET/x402/status

Service status and payment configuration

Utility
0.005 USDCper request
GET/x402/time

Current server time in UTC

Data
0.005 USDCper request
GET/x402/uuid

Generate a random UUID v4

Tools
0.005 USDCper request
GET/x402/random

Generate a random integer and hex bytes

Tools
0.005 USDCper request
GET/x402/ip

Return the requester IP address

Data
0.005 USDCper request
GET/x402/network

Base network and USDC payment metadata

Crypto
0.005 USDCper request
POST/x402/echo

Echo a JSON message back

Tools
0.005 USDCper request
POST/x402/hash

Compute a SHA-256 hash of text

Crypto
0.005 USDCper request
POST/x402/keccak

Compute a Keccak-256 hash of text

Crypto
0.005 USDCper request
POST/x402/base64

Encode or decode Base64 text

Tools
0.005 USDCper request
POST/x402/slug

Convert text into a URL-safe slug

Tools
0.005 USDCper request
POST/x402/wordcount

Count words, characters, and lines in text

Data
0.005 USDCper request
GET/x402/payment

Payment receipt with transaction details

Payment
0.005 USDCper request
GET/x402/quote

Payment quote with amount, asset, and merchant wallet

Payment
0.005 USDCper request
POST/x402/summarize

AI text summarization

AI
0.01 USDCper request
POST/x402/rewrite

AI rewrite of input text

AI
10 USDCper request
POST/x402/sentiment

AI sentiment analysis of text

AI
10 USDCper request
POST/x402/keywords

AI keyword extraction from text

AI
10 USDCper request
POST/x402/classify

AI topic classification of text

AI
20 USDCper request
POST/x402/outline

AI outline generated from text

AI
20 USDCper request

Prices are published by the X-Pay resource catalogue. The payment quote confirms the amount before authorization.

Pay for the call.
Keep building.

Public API access is priced per request. Discover resources without an account or API key, then use a compatible payment client and a funded wallet to call a paid endpoint.

Read the request schemas
Utility, tools, crypto & data0.005 USDC
AI summarization0.01 USDC
Rewrite, sentiment & keywords10 USDC
Classification & outlines20 USDC

Build your
x402 integration.

Discuss payment verification and settlement for your endpoints with the X-Pay team. Share your network, traffic and integration requirements.

Explore the merchant app, request product updates or contact the team about your integration.

Explore the merchant app

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Built today.
Designed for what’s next.

Available

Public APIs & merchant tools

Discover paid resources on Base and access the merchant workspace for payment, usage and developer workflows.

Next

Third-party facilitator access

Extend payment verification and settlement to more merchant endpoints, alongside broader AI and agent tooling.

Our direction

An autonomous economy

Machines that earn from completed work and pay for compute, connectivity and energy. Robotics integrations are a near-term expansion direction.

Read the whitepaper