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Blockchain Chain Facts Lookup
x402
Blockchain Chain Facts Lookup is a paid API for AI agents from payments-intel-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).
Returns canonical chain metadata (CAIP-2 ID, gas token, finality class, block explorer, x402/MPP settlement support, and stablecoins) for a named or identified blockchain
Price / call$0.001
Success—
StatusUnknown
How this service works
What are the basic facts of this chain (CAIP-2 id, gas token, explorer, x402/MPP settlement, stablecoins)? Cited chain facts from a prepared dataset: CAIP-2 chain id, gas token, finality class, block explorer, whether x402 and MPP settle there, and stablecoins. Fields not established from a source are the string "unknown". Unknown chains and malformed input return 404/400 and are never charged.
Output
A structured record containing: the canonical CAIP-2 chain ID, the native gas token symbol, the finality class (e.g. fast/probabilistic), the block explorer URL, boolean flags for x402 and MPP settlement support, and a list of supported stablecoins. Fields not sourced from a verified dataset return the string 'unknown'. Unknown or malformed chain identifiers return 404 or 400 respectively with no charge.
Example use cases
Verify x402 payment route for chain
“Before I send an x402 payment, can you check whether Optimism actually supports x402 settlement and what stablecoins I can use there?”
Resolve CAIP-2 ID for integration
“I need the official CAIP-2 chain ID for Base so I can configure my wallet integration — can you look that up?”
Compare gas tokens across chains
“What's the native gas token on Polygon, and does it have a block explorer I can link users to?”
Technical details
Endpoint
GEThttps://payments-intel-production.up.railway.app/v1/chain?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to resolve authoritative chain metadata — especially CAIP-2 IDs, x402/MPP settlement eligibility, or stablecoin availability — from a single curated lookup rather than scraping documentation or relying on stale hardcoded values. Particularly valuable in payment routing flows where knowing whether a chain supports x402 or MPP before initiating a transaction avoids failed payment attempts.
Side effects
- Unknown chain slug or name returns 404 with no charge
- Malformed input (e.g. invalid CAIP-2 format) returns 400 with no charge
- Fields without verified data return the string 'unknown' rather than an error
- Chain not yet indexed in dataset returns 404
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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