# Universal Data API — discover, compare and buy tools for AI Agents

> 131 on-demand professional HTTP APIs, 13 remote MCP servers, 22 Skill/CLI ZIP products. API calls cost 0.01 USDC on Base via x402. Customer provider credentials and external costs are separate.

## Start here (free discovery)
- [Home and product catalog](https://universal-data-api.jkpua1.workers.dev/store)
- [OpenAPI 3.1 with input contracts](https://universal-data-api.jkpua1.workers.dev/openapi.json)
- [x402 v2 manifest with live resource payments](https://universal-data-api.jkpua1.workers.dev/.well-known/x402.json)
- [Existing x402 URL discovery](https://universal-data-api.jkpua1.workers.dev/.well-known/x402)
- [13 MCP server URLs](https://universal-data-api.jkpua1.workers.dev/mcp)
- [Product catalog JSON](https://universal-data-api.jkpua1.workers.dev/store/catalog)
- [Task-matched product discovery](https://universal-data-api.jkpua1.workers.dev/store/recommend?task=x402%20payment%20setup)
- [Four-offer payment integration buyer guide](https://universal-data-api.jkpua1.workers.dev/store/agent-buy)

## Paid AI APIs (0.01 USDC per authorized call)
- Agent Commerce Hunter: https://universal-data-api.jkpua1.workers.dev/v1/agent-commerce-hunter — source product offers or public pages, optional order profit.
- Agent Web Research: https://universal-data-api.jkpua1.workers.dev/v1/agent-web-research — attributed news and scholarly sources with optional public page and PDF extraction.
- Agent Intelligence: https://universal-data-api.jkpua1.workers.dev/v1/agent-intelligence — compose research and optional customer-keyed commerce.
- Dual Payment Setup: https://universal-data-api.jkpua1.workers.dev/v1/payment-setup — generate separate x402/Base USDC and MPP/Tempo seller/buyer starter projects.
- Other specialist capabilities: see OpenAPI or x402 manifest. Health and financial calculators are not credential-free live medical or exchange data.

## Remote MCP
- General: https://universal-data-api.jkpua1.workers.dev/mcp/general
- Payments and software automation: https://universal-data-api.jkpua1.workers.dev/mcp/software-automation
- Other industries: https://universal-data-api.jkpua1.workers.dev/mcp
- MCP tool calls forward to the same paid API: no duplicate platform charge. Client must support the HTTP 402 x402 challenge.

## Pay once for offline downloads
- Dual Payment Setup Skill: 4.99 USDC, includes offline x402 and MPP examples. https://universal-data-api.jkpua1.workers.dev/store/product/dual-payment-setup-skill
- Dual Payment Setup CLI: 9.99 USDC, offline generator. https://universal-data-api.jkpua1.workers.dev/store/product/dual-payment-setup-cli
- Other ZIP packages: https://universal-data-api.jkpua1.workers.dev/store/catalog

## Rules for agent buyers
- Read free metadata first and match capabilities to the task, prerequisites and full cost.
- A normal browser click on a paid URL is not a completed purchase. Use a compatible Base USDC x402 wallet client.
- Request wallet-owner approval of resource, recipient and maximum price before each payment. Do not send wallet private keys to this service.
- A 402 challenge proves an endpoint requires payment, not that a paid call succeeded.
- Customer-funded third-party keys must use the declared HTTPS credential headers. Do not imply missing paid providers are included.
- Learn more: https://universal-data-api.jkpua1.workers.dev/guides/agent-payment-integration and https://universal-data-api.jkpua1.workers.dev/guides/agent-api-discovery