# APIStead

> The steady home for agent APIs. Discover, verify and pay for APIs that AI agents can actually use. Pay per call in USDC on Base. No API keys, no subscriptions, no account setup.

APIStead is an API catalogue and verification layer for x402 APIs. Discovery is free. Payment happens on the API's own HTTP 402 challenge. APIStead is not in the payment path and takes no cut of the call.

Marketplace status: APIStead Marketplace is not accepting new listing submissions yet. All live APIs are first-party APIs built and operated by APIStead Labs.

## Start here

- Marketplace UI: https://x402.apistead.qd.je
- MCP server: https://apistead.qd.je/mcp
- Agent skill: https://apistead.qd.je/skill
- HTTP search: https://apistead.qd.je/agent/search?q=zip
- HTTP list: https://apistead.qd.je/agent/list
- HTTP get: https://apistead.qd.je/agent/get?id=us-zip-code-api
- OpenAPI: https://apistead.qd.je/openapi.json
- Full catalogue: https://apistead.qd.je/llms-full.txt
- Receipts: https://apistead.qd.je/agent/receipts
- x402 manifest: https://apistead.qd.je/.well-known/x402
- x402 resource manifest: https://apistead.qd.je/.well-known/x402.json
- API reference: https://apistead.qd.je/api
- MCP guide: https://apistead.qd.je/mcp-docs

## How agents use it

1. Search the catalogue over MCP or HTTP. Discovery is free and never returns a 402.
2. Read the listing: price, network, routes, schema, verification and reliability.
3. Call the provider's own route unpaid. Read the `PAYMENT-REQUIRED` challenge.
4. Pay the quoted USDC amount on Base and retry with `PAYMENT-SIGNATURE`.
5. Receive the response and a `PAYMENT-RESPONSE` receipt.

## Payments

- Only rail: x402 with USDC on Base. There is no card checkout or subscription billing.
- The agent pays the provider's `payTo` wallet directly. APIStead never holds funds.
- No subscription, no API key and no account setup for agents.
- Provider verification, featured placement and enterprise work are also priced in USDC on Base.

## Catalogue summary

- Listings: 10
- Providers: 1
- Categories: Address & Location, Compliance, Media, Public Records, Verification, Weather & Geospatial
- Networks: base
- Price range: $0.001-$0.030 USDC per call
- Settlement verification: a real paid call from APIStead's own wallet, with a public receipt

## Listings

### Geocoding & Reverse Geocoding API

- ID: geocoding-api
- Provider: APIStead Labs
- Category: Weather & Geospatial
- Price: $0.001-$0.001 USDC per call
- Networks: base
- Verification: verified
- Reliability: 87 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/geocoding-api
- Markdown: https://apistead.qd.je/api/apis/geocoding-api/md

Address to coordinates, coordinates to address.

### IP Geolocation API

- ID: ip-geolocation-api
- Provider: APIStead Labs
- Category: Address & Location
- Price: $0.001-$0.001 USDC per call
- Networks: base
- Verification: verified
- Reliability: 86 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/ip-geolocation-api
- Markdown: https://apistead.qd.je/api/apis/ip-geolocation-api/md

Turn an IP into a place and network.

### Sanctions & PEP Screening API

- ID: sanctions-screening-api
- Provider: APIStead Labs
- Category: Compliance
- Price: $0.01-$0.01 USDC per call
- Networks: base
- Verification: verified
- Reliability: 85 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/sanctions-screening-api
- Markdown: https://apistead.qd.je/api/apis/sanctions-screening-api/md

A deterministic first pass against sanctions lists.

### US ZIP Code API

- ID: us-zip-code-api
- Provider: APIStead Labs
- Category: Address & Location
- Price: $0.001-$0.002 USDC per call
- Networks: base
- Verification: verified
- Reliability: 87 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/us-zip-code-api
- Markdown: https://apistead.qd.je/api/apis/us-zip-code-api/md

Validate and enrich any US ZIP code.

### Coordinates & Distance API

- ID: coordinates-distance-api
- Provider: APIStead Labs
- Category: Weather & Geospatial
- Price: $0.001-$0.001 USDC per call
- Networks: base
- Verification: verified
- Reliability: 87 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/coordinates-distance-api
- Markdown: https://apistead.qd.je/api/apis/coordinates-distance-api/md

Distance, midpoint and bearing between coordinates.

### Email Verification API

- ID: email-verification-api
- Provider: APIStead Labs
- Category: Verification
- Price: $0.001-$0.001 USDC per call
- Networks: base
- Verification: verified
- Reliability: 88 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/email-verification-api
- Markdown: https://apistead.qd.je/api/apis/email-verification-api/md

Real-time email verification for AI agents, with a quality score.

### Global Weather API

- ID: global-weather-api
- Provider: APIStead Labs
- Category: Weather & Geospatial
- Price: $0.001-$0.002 USDC per call
- Networks: base
- Verification: verified
- Reliability: 85 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/global-weather-api
- Markdown: https://apistead.qd.je/api/apis/global-weather-api/md

Current conditions and forecasts by coordinates.

### Spotify API for AI Agents

- ID: spotify-api
- Provider: APIStead Labs
- Category: Media
- Price: $0.02-$0.02 USDC per call
- Networks: base
- Verification: verified
- Reliability: 87 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/spotify-api
- Markdown: https://apistead.qd.je/api/apis/spotify-api/md

Spotify API, metadata for agents: playlists, albums, artists and tracks. Complete discographies are in v2.

### Spotify API v2 for AI Agents

- ID: spotify-api-v2
- Provider: APIStead Labs
- Category: Media
- Price: $0.03-$0.03 USDC per call
- Networks: base
- Verification: verified
- Reliability: 79 / 100
- Base URL: https://apistead.qd.je/api/v2
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/spotify-api-v2
- Markdown: https://apistead.qd.je/api/apis/spotify-api-v2/md

Spotify metadata v2: tracks, albums, artists, playlists, search, full discographies, artist playlists, related artists, discovered-on and featuring playlists, similar albums, podcasts, episodes, audiobooks, chapters, genres and users. No auth, no API key.

### US Building Permits API

- ID: us-building-permits-api
- Provider: APIStead Labs
- Category: Public Records
- Price: $0.01-$0.01 USDC per call
- Networks: base
- Verification: verified
- Reliability: 85 / 100
- Base URL: https://apistead.qd.je/api/v1
- MCP: https://apistead.qd.je/mcp
- JSON: https://apistead.qd.je/api/apis/us-building-permits-api
- Markdown: https://apistead.qd.je/api/apis/us-building-permits-api/md

Permit history for US properties and contractors.


## Notes

- The public catalogue is served by APIStead. The 402 challenge on each provider route is the authoritative price quote.
- Settlement-verified covers one named route, not the whole listing. It is not a claim about buyer demand.
- x402 payments are final. Use a dedicated wallet and a per-call cap.

## Contact

- Email: spnkrnsm1@gmail.com
- Site: https://apistead.qd.je