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PayAPI Market
FreeStarting price
0Popularity
About PayAPI Market
PayAPI Market is an on-chain marketplace where AI agents can pay for API calls directly using USDC on the Base network. The platform verifies listings by settling payments from its own buyer wallet before granting a badge, ensuring only functional and paid-for APIs appear. Providers retain 100% of each settlement and can list APIs without monthly fees or subscriptions. Buyers avoid API keys, accounts, or monthly plans, paying only per request. The x402 payment standard enables automatic payouts to providers upon agent requests, with sub-second settlement and minimal transaction fees. The marketplace targets domain experts such as mortgage brokers, recruiters, and compliance officers who can monetize specialist knowledge through APIs. It supports MCP-native clients like Claude Desktop and Cursor, as well as LangChain agents and custom MCP-compatible clients.
Key features
- x402 payment standard for agent-to-provider transactions
- On-chain USDC settlements with sub-second confirmation
- MCP-native client support (Claude Desktop, Cursor, LangChain)
- Per-endpoint pricing from $0.0001 to any amount
- Auto-sync with MCP Registry for agent discovery
- No platform fees or cuts on settlements
- Flat $49/month featured placement option
- Unlimited API listings for providers
Use cases
- UK property data lookups for mortgage brokers
- Company registry checks for compliance officers
- Real-time AI ecosystem data for developers
Pros
- No API keys or accounts required for buyers
- Providers keep 100% of settlements
- Pay-per-request pricing with no monthly commitments
- On-chain USDC settlements on Base network
- Verified listings via real payment settlement
Cons
- Requires crypto wallet for providers to receive payments
- Limited to USDC payments on Base network
- Featured placement costs $49/month
- No free tier for buyers beyond pay-per-request model
Frequently asked questions about PayAPI Market
What is PayAPI Market and how does it work?
PayAPI Market is an on-chain marketplace where AI agents can pay for API calls directly using USDC on the Base network. Agents pay per request without needing API keys, accounts, or monthly plans, while providers receive automatic payouts via the x402 payment standard with sub-second settlement.
Who should use PayAPI Market?
The platform is designed for domain experts such as mortgage brokers, recruiters, compliance officers, and other professionals who can monetize their specialist knowledge by listing APIs. It is also suited for AI agent developers and enterprises using MCP-native clients like Claude Desktop or Cursor.
How does PayAPI Market verify API listings?
Listings are verified by settling payments from PayAPI’s own buyer wallet before granting a badge, ensuring only functional and paid-for APIs appear. The badge is enforced at the database level and cannot be set without a matching settlement record.
What are the pricing models for buyers and providers?
Buyers pay only per request with no subscriptions or monthly plans, while providers can list APIs for free and keep 100% of each settlement. Featured placement is available for a flat monthly fee, but there are no per-request fees for providers.
What integrations or clients does PayAPI Market support?
The marketplace supports MCP-native clients like Claude Desktop and Cursor, as well as LangChain agents, custom MCP-compatible clients, and other agent runtimes. It is also listed on directories like the Official MCP Registry and PulseMCP.
How do I get started with PayAPI Market?
Providers can list their API for free by submitting it through the platform, while buyers can browse verified APIs and pay per request directly. No signup or API keys are required for buyers to access the marketplace.
