Chain ID (EIP-155)
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. List your own x402 service on bazaar.agentexchange.work/listings: 1 USD, 30 days, live at once, no account.
- Category
- Crypto & DeFi
- Starting price
- $0.001
- Paid calls · 30 days
- 5
- Unique payers · 30 days
- 5
Paid endpoints
3 endpoints, sorted by usage. Prices are per request.
- GET/chain/chain-id
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. List your own x402 service on bazaar.agentexchange.work/listings: 1 USD, 30 days, live at once, no account.
$0.001Base3calls / 30d - POST/directory/list
Pay $1 USDC on Base to list your x402 endpoint for 30 days in the Agent Exchange directory, shown on every discovery file this store serves (/.well-known/x402, /, agent.json, agent-card.json, ard.json, llms.txt, /directory: 162 distinct agents and 4,041 reads on 2026-10-21; 35 agents read these terms that day) and on bazaar.agentexchange.work/listings. No account, no review; free hosts listed at o
$1.00Base1calls / 30d - GET/chain/nonce
An address's transaction count (nonce) via eth_getTransactionCount — the next nonce to use and total outgoing transactions, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The read settlement and trading agents make to build and sequence transactions. Live public RPC; one paid call.
$0.003Base1calls / 30d