The steady home for agent APIs.
Discover APIs that AI agents can actually use. Every listing states the price, network and wallet before a call. Verified routes link a real paid receipt.
10
listed APIs
1
provider
1
network
0%
platform fee
US ZIP Code API
GET /v1/us-zip/10001
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "USDC",
"amount": "1000",
"payTo": "0x…"
}The agent reads the price before it pays. The provider is paid directly. APIStead never touches the money.
Illustrative call shape
Featured
Essential APIs. Real agent demand.
ZIP codes, IP intelligence, addresses, sanctions lists, public records and weather. The operational calls agents make every day.
Geocoding & Reverse Geocoding API
APIStead Labs
Address to coordinates, coordinates to address.
IP Geolocation API
APIStead Labs
Turn an IP into a place and network.
Sanctions & PEP Screening API
APIStead Labs
A deterministic first pass against sanctions lists.
US ZIP Code API
APIStead Labs
Validate and enrich any US ZIP code.
Bundles
Start with an outcome, not an endpoint.
Small workflows with a defined order, a cost estimate and a prompt your agent can follow.
US Address Intelligence
Validate, normalize and locate a US address in one pass.
Weather-Aware Operations
Turn a location into current conditions and a short forecast.
Spotify Artist Research
Search an artist, map the full discography and find adjacent playlists.
How it works
Discover → read the price → pay → verify.
No signup flow. No procurement cycle. The entire contract fits in an HTTP response.
Discover
Search the catalogue, or connect one MCP endpoint and let the agent search at runtime.
Read the 402
The unpaid request returns price, network, token and payout wallet before any money moves.
Pay & verify
The agent pays USDC directly to the provider. APIStead publishes the paid receipt for verified routes.
Trust
A valid 402 does not prove delivery.
Anyone can return a payment challenge. The harder question is whether the API actually returns product after the money settles. APIStead pays one named route from its own wallet, checks the response, and links the on-chain USDC receipt.
The badge covers that route, not the whole listing. It is a paid check, not a promise of future uptime or buyer demand.
Read the agent-ready checklist- Listing
- US ZIP Code API
- Route
- GET /v1/us-zip/{zip}
- Paid
- 0.001 USDC
- Network
- Base (eip155:8453)
- Result
- 200 OK, real product returned
Receipt
0xseed…replace-with-real-base-receipt
Illustrative receipt. It becomes a real Base transaction hash after the first paid verification call.
Built for agents
One MCP endpoint. Free discovery. No keys.
Agents can search, list and inspect every API without an account. Payment happens on the provider's own route, so APIStead never sits between the agent and the money.
{
"mcpServers": {
"apistead": {
"url": "https://apistead.qd.je/mcp"
}
}
}Pay per call
Prices start at $0.001. The 402 challenge states the exact amount before the agent signs anything.
Verified routes
A real paid call, a real response and a public receipt. Not a health ping dressed up as trust.
Agent-native interfaces
MCP, HTTP JSON, OpenAPI and llms.txt. Use the one your runtime already speaks.
For providers
You have the data. Agents have the budget.
List a paid route for free. Keep 100% of what each call earns. We verify one route with a real payment and publish the receipt, so agents can trust the first call.
Guides
Read before you build.
Direct, practical guidance for providers and agent developers. No filler.
Guide
x402 in 60 seconds
The HTTP 402 flow, the headers, the facilitator and the most common misunderstanding.
ReadGuide
Best APIs for agent traffic
ZIP codes, IP intelligence, addresses, sanctions lists and the operational data agents actually pay for.
ReadGuide
How x402 payments work
Where the USDC lands, how to set up a payout wallet, facilitator fees, and why the rail stays x402-only.
ReadFAQ
Questions agents and providers ask.
What is APIStead?+
APIStead is a catalogue of APIs that AI agents can discover, understand and pay for per request. Every listing states its price, network and payout wallet. Verified listings link a real paid call and an on-chain receipt.
What is x402?+
x402 is an open payment protocol that uses HTTP 402 Payment Required to quote a price, network, token and wallet in the response. An agent signs a USDC payment, retries the request, and a facilitator verifies and settles it on-chain. No account or API key is required.
Do agents need an API key?+
No. Discovery is free over MCP or HTTP, and payment happens on the provider's own x402 endpoint. The agent pays per call in USDC and never signs up for a subscription.
How does settlement-verified work?+
APIStead pays one named route from its own wallet, checks that real product comes back, and publishes the on-chain USDC receipt. The badge covers that route, not every route on the listing, and it is not a claim about buyer demand.
What does listing cost?+
Listing is free and providers keep 100% of what each call earns. APIStead is not in the payment path, so it never holds provider funds.
Is the catalogue live?+
The live catalogue publishes approved listings after review. Every listing states its verification state, network and price.