x4PayAPI Market

Kallipolis Proof

Live evidence check for a public HTTPS domain or a Base address. POST /api/v1/quick-resolve returns a verdict, a confidence score, observed signals with fetch timestamps, and findings. The paid route reports OpenAPI document checks and agent discoverability signals for the target domain or Base address. $0.01 USDC per call on Base, no API key. The badge covers this route only; deeper analysis routes on this host are unpaid and unverified. Informational evidence only: not an audit, not a compliance sign off, and not a legal guarantee.

1 of 2 routes settlement-verified · $0.01 USDC/request · 2 endpoints / 2 tools · Verification · base network · x402 protocol

Verified routes

Other routes are unverified.

Networks: Base (settlement-verified)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider
Kallipolis Proof
Hosted at
proof.platoskallipolis.com
Category
Verification
Price
$0.01 USDC per request
Endpoints
2
MCP tools
2
Payment networks
Base
Settlement-verified
1 route, last checked 2026-09-09
Listed on PayAPI Market
2026-09-04

Try Kallipolis Proof

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://proof.platoskallipolis.com/api/v1/quick-resolve"

About this API

Kallipolis Proof is listed in the Verification category with pricing at $0.01 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-09. 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 2 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.

Questions about this API

What does Kallipolis Proof do?

Live evidence check for a public HTTPS domain or a Base address. POST /api/v1/quick-resolve returns a verdict, a confidence score, observed signals with fetch timestamps, and findings. The paid route reports OpenAPI document checks and agent discoverability signals for the target domain or Base address. $0.01 USDC per call on Base, no API key. The badge covers this route only; deeper analysis routes on this host are unpaid and unverified. Informational evidence only: not an audit, not a compliance sign off, and not a legal guarantee. It is provided by Kallipolis Proof.

How much does Kallipolis Proof cost?

Kallipolis Proof is priced at $0.01 USDC per request, paid per call with no subscription. PayAPI Market paid 0.01 USDC for one call to /api/v1/quick-resolve 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 Kallipolis Proof?

No. Kallipolis Proof uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has Kallipolis Proof been verified?

Yes, 1 route of its 2 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 2026-09-09. Routes that were not paid for are unverified.

How does an AI agent find Kallipolis Proof?

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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