PHION Evidence Engine
Fetches a public URL, hashes the bytes, and returns a signed observation. Not a guarantee about the site. POST /v1/paid/fetch-evidence $0.004 USDC on Base. Paid body may report HTTP 206.
1 of 3 routes settlement-verified · $0.004 USDC/request · 3 endpoints / 3 tools · Verification · base network · x402 protocol
Verified routes
POST /v1/paid/fetch-evidence· $0.004 · 2026-09-11 · receipt
Other routes are unverified.
Networks: Base (settlement-verified), Solana (accepted)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpListing facts
- Provider
- PHION Systems
- Hosted at
phion.systems- Category
- Verification
- Price
- $0.004 USDC per request
- Endpoints
- 3
- MCP tools
- 3
- Payment networks
- Base, Solana
- Settlement-verified
- 1 route, last checked 2026-09-11
- Listed on PayAPI Market
- 2026-09-11
Try PHION Evidence Engine
Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.
curl -i -X POST "https://phion.systems/v1/paid/fetch-evidence"About this API
PHION Evidence Engine is listed in the Verification category with pricing at $0.004 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-11. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 3 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
Questions about this API
What does PHION Evidence Engine do?
Fetches a public URL, hashes the bytes, and returns a signed observation. Not a guarantee about the site. POST /v1/paid/fetch-evidence $0.004 USDC on Base. Paid body may report HTTP 206. It is provided by PHION Systems.
How much does PHION Evidence Engine cost?
PHION Evidence Engine is priced at $0.004 USDC per request, paid per call with no subscription. PayAPI Market paid 0.004 USDC for one call to /v1/paid/fetch-evidence when it verified the listing. The exact amount for each call is in the HTTP 402 response before any money moves.
Do I need an API key or account to use PHION Evidence Engine?
No. PHION Evidence Engine uses the x402 protocol, so an agent pays per request in USDC on Base, Solana and gets the response, with no API key, account or signup.
Has PHION Evidence Engine been verified?
Yes, 1 route of its 3 endpoints. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-09-11. Routes that were not paid for are unverified.
How does an AI agent find PHION Evidence Engine?
Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.
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