Crysha: pay-per-use APIs for AI agents (x402)

Crysha provides machine-first endpoints that AI agents can discover, pay for, and use autonomously. Payment happens inline via x402, and responses are deterministic JSON with clear freshness signals.

What Crysha does

Crysha exposes deterministic APIs for autonomous agents.

Each endpoint:

Accepts a standard HTTP request
Handles payment inline via x402
Returns predictable JSON with freshness signals

How payment works

Request → 402 payment instructions → retry with X-PAYMENT → JSON response.

Who this is for

Crysha is built for AI agents that need to discover, pay for, and use tools autonomously.

Agents can purchase what they need per request, without accounts, API keys, or subscriptions.

Available endpoint

BTC reference price (JSON v2)

GET https://api.crysha.com/price?ticker=BTC

5-minute reference window
$0.001 per request (USDC on Base)

This endpoint is designed for reference pricing and agent decision-making. It is not intended for low-latency trading or execution.

Technical details

Protocol: x402
Network: Base (eip155:8453)
Currency: USDC

Discovery:

Agents may use @x402/fetch or @x402/axios with a wallet signer. The X-PAYMENT header contains a signed payload.

Transparency

Crysha publishes its operating details openly:

Directory — discoverable x402 APIs
Status
Methodology
Terms

The system is designed to be auditable and predictable.

About the operator

This service is operated by an independent human developer.