Agent Exchange
GET https://store.agentexchange.work/chain/chain-id
Listed in x402 List · Data: x402-list.com (CC BY 4.0)
The EIP-155 chain ID for any supported network via eth_chainId — the read multi-chain agents make to confirm which chain an RPC is on before signing. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; 6 chains vs onesource's Ethereum-only coverage.
Other endpoints from store.agentexchange.work
The same service's other paid functions that Hagglyai tracks, each with its own price. Functions outside Hagglyai's categories are not listed.
| Endpoint | Category | Price per call |
|---|---|---|
| GET /chain/block-number | On-chain data | $0.001 |
| GET /chain/estimate-gas | On-chain data | $0.09 |
| GET /chain/storage | On-chain data | $0.09 |
| GET /chain/supply | Crypto prices & market data | $0.01 |
| GET /chain/tx | On-chain data | $0.008 |
| GET /crypto/prices | Crypto prices & market data | $0.01 |
| GET /weather/forecast | Weather | $0.01 |
| GET /web/search | Web search | $0.01 |
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://store.agentexchange.work/chain/chain-id"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
Not checked yet. New endpoints are checked within a day.
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves