x4PayAPI Market

Agent Master Data

Agent Master Data serves governed public reference data, such as country, territory, language, currency and media-type code lists, from https://api.agentmasterdata.com. Pay per call in USDC on Base via x402. Discovery, schema and pricing are free.

1 of 4 routes settlement-verified · $0.01–$0.1 USDC/request · 4 endpoints · Data · 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
Agent Master Data
Hosted at
api.agentmasterdata.com
Category
Data
Price
$0.01 to $0.1 USDC per request
Endpoints
4
Payment networks
Base
Settlement-verified
1 route, last checked 2026-11-03
Listed on PayAPI Market
2026-11-02

Try Agent Master Data

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 "https://api.agentmasterdata.com/v1/reference-data/cldr-territories-en"

About this API

Agent Master Data is listed in the Data category with pricing at $0.01–$0.1 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-11-03. 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 4 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.

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Settlement-verified on PayAPI Market

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<a href="https://payapi.market/api/agent-master-data"><img src="https://payapi.market/badge/agent-master-data.svg" alt="Settlement-verified on PayAPI Market" height="20"></a>

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Questions about this API

What does Agent Master Data do?

Agent Master Data serves governed public reference data, such as country, territory, language, currency and media-type code lists, from https://api.agentmasterdata.com. Pay per call in USDC on Base via x402. Discovery, schema and pricing are free. It is provided by Agent Master Data.

How much does Agent Master Data cost?

Agent Master Data is priced at $0.01 to $0.1 USDC per request, paid per call with no subscription. Verified with a $0.01 test payment on 3 Nov 2026. 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 Agent Master Data?

No. Agent Master Data 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 Agent Master Data been verified?

Yes, 1 route of its 4 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 2026-11-03. Routes that were not paid for are unverified.

How does an AI agent find Agent Master Data?

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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