# Space Data API — pay-per-request data for AI agents (x402/USDC on Base)

Two product lines, no API keys — payment IS authentication:
1. Real-time SpaceX / Starship / Starlink launch data (Launch Library 2 source)
2. Curated public-domain historical science & engineering plates (1588-1748),
   visually verified with captions; images via Internet Archive IIIF

## How to pay (x402 protocol)
GET a paid endpoint -> HTTP 402 with PAYMENT-REQUIRED header (base64 JSON) ->
sign USDC payment (network eip155:8453, facilitator CDP) -> retry with payment
header -> receive data. SDKs: pip install x402[httpx,evm] / npm @x402/fetch

## Free endpoints
https://agentdataapi.onrender.com/                        full catalog with prices
https://agentdataapi.onrender.com/archive/catalog         historical works catalog
https://agentdataapi.onrender.com/archive/plates/catalog  curated plate ids + titles
https://agentdataapi.onrender.com/openapi.json            OpenAPI spec

## Paid endpoints
https://agentdataapi.onrender.com/archive/plate  [$0.05]  One visually verified, human-curated plate from a Renaissance engineering classic: high-res IIIF image URLs plus a written caption explaining the depicted machinery or process
https://agentdataapi.onrender.com/archive/plates  [$0.10]  The complete curated plate set for one work — every visually verified diagram plate with captions, image URLs, and provenance
https://agentdataapi.onrender.com/archive/work  [$0.02]  Complete structured package for one illustrated classic of early science/engineering (1588-1748): verified public-domain scan, full metadata, curated description, full-text OCR link, IIIF manifest, and page-image URL template
https://agentdataapi.onrender.com/archive/page  [$0.01]  Direct IIIF image URLs (multiple resolutions) for a specific page of a public-domain illustrated classic, with work context and provenance
https://agentdataapi.onrender.com/launches  [$0.01]  Upcoming SpaceX launches (next 5) with mission, pad, and T-0 details
https://agentdataapi.onrender.com/launches/today  [$0.01]  SpaceX launches in the next 24 hours (empty list if none)
https://agentdataapi.onrender.com/starship  [$0.02]  Upcoming and recent Starship launches with status and mission info
https://agentdataapi.onrender.com/starship/next  [$0.01]  The single next Starship flight with a live countdown in seconds
https://agentdataapi.onrender.com/starlink  [$0.01]  Upcoming Starlink deployment missions (next 5)
https://agentdataapi.onrender.com/events  [$0.01]  Upcoming space events: dockings, spacewalks, landings (next 5)

## Discovery
Listed in the x402 Bazaar (CDP facilitator index). Semantic search:
https://api.cdp.coinbase.com/platform/v2/x402/discovery/search?query=...

Source: https://github.com/nigelcox98/AgentDataAPI