# Anyway Possible Agent Web Evidence

> Pay-per-call URL preflight and evidence APIs for autonomous agents.

Base URL: https://anywaypossible.com
Entry endpoint: POST /api/check — $0.001 USDC
Batch endpoint: POST /api/batch — $0.01 USDC for up to 10 URLs
Evidence endpoint: POST /api/verify — $0.01 USDC
Payment protocol: x402 v2
Network: Base (eip155:8453)
Payment asset: USDC
Authentication: none; payment requirements are returned as HTTP 402

## Request

Content-Type: application/json

Required JSON field:
- url: a public HTTP(S) URL

Optional JSON fields for both endpoints:
- expectedStatus: integer from 100 through 599

Optional field for /api/verify:
- expectedText: text expected in the response body, maximum 500 characters

Example request body:
{"url":"https://example.com","expectedStatus":200,"expectedText":"Example Domain"}

## Integration flow

1. POST JSON to /api/check for one fast preflight, /api/batch for up to 10 URLs, or /api/verify for full evidence.
2. Read the HTTP 402 response and x402 payment requirements.
3. Select the Base payment option. Authorize at most 1000 atomic USDC units for /api/check or 10000 for /api/batch and /api/verify.
4. Repeat the POST with the x402 payment signature.
5. Treat HTTP 200 as a completed paid request. Full verification includes observedAt, finalUrl, redirectChain, contentSha256, receiptId, metadata, and selected response headers.

## Machine-readable resources

- OpenAPI: https://anywaypossible.com/openapi.json
- Entry check metadata: https://anywaypossible.com/api/check
- Batch check metadata: https://anywaypossible.com/api/batch
- Endpoint metadata: https://anywaypossible.com/api/verify
- Health: https://anywaypossible.com/api/health
- Aggregate usage: https://anywaypossible.com/api/stats

The service blocks private-network destinations, caps response size, validates redirects, and does not require an account or API key.