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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.

Projects: 4.4K
Paid endpoints: 87K
Paid calls · 30 days: 885K
Launched here: 0

Crypto & DeFi

2 results

Most used Rising Most payers Newest Cheapest A–Z

SpendTheBitsCrypto & DeFi
Official $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.
BaseEVM chain 5042Polygon+1x402.spendthebits.com
from $0.003
9 endpoints
47
30 payers
Gas PriceCrypto & DeFi
Gas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.001 USDC/call; failed calls are free.
BasePolygonArbitrum+3x402-seller-pmlm.onrender.com
from $0.001
15 endpoints
47
30 payers

Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.