plainchain.appin60.com
Route probed: GET https://plainchain.appin60.com/v1/gas
Category: eat:onchain/crypto data (tags: token-analytics, defi, nft, wallet, dev-utils, entertainment) · Status: listing listed, probe active · Listing: 0.001042 USD, 3 payers / 3 calls (30d, Bazaar) · Listed in: agentic-market, cdp-bazaar, x402-list
Last probe: 2026-10-23T14:44:29Z (2 h ago) · Recent valid 402: 2/2 · p50 1238 ms
probe-only: no paid test-buys yet. No index until 3 paid buys on 3 different days.
Badge: 
Paid test-buys
None yet.
402 challenge checks (since 2026-10-23T14:44:29Z)
1 valid 402s checked: terms consistent 1, Base USDC offered 1, price matches listing 1 (differs 0), payTo changed vs previous probe 0.
Unpaid probes (newest first, up to 200; raw receipts are kept 7 days, then in the archive)
| Receipt | UTC time | Method | Status | Valid 402 | ms | Listed amount (atomic) | Quoted amount (atomic) | Quoted payTo | Header bytes | Response sha256 | Signed | Route | Checks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 254225b22f8bbce01eb9 | 2026-10-23T14:44:29Z | GET | 402 | yes | 1238 | 1042 | 1042 | 0xB442daCA… | 2236 | b720fa04c9a666e1 | per-receipt | primary | terms ok · Base USDC |
| 815755fbfaa4a43fd486 | 2026-10-23T12:43:34Z | GET | 402 | yes | 631 | 1042 | 1042 | 0xB442daCA… | 2236 | b720fa04c9a666e1 | snapshot | primary |
Other listed routes
https://plainchain.appin60.com/v1/gasCurrent gas price on Base, Arbitrum, Ethereum or Optimism, with the USD cost right now of an ETH transfer, ERC-20 transfer, DEX swap and NFT mint. Use before se (cdp-bazaar)https://plainchain.appin60.com/v1/bazaar/searchFind x402 APIs that agents actually pay for: keyword search over the whole Coinbase x402 Bazaar (31,000+ paid endpoints), ranked by distinct paying wallets in t (cdp-bazaar)https://plainchain.appin60.com/v1/factA random crypto history fact (Bitcoin genesis, Pizza Day, The Merge, EIP-1559, x402 and HTTP 402, USDC, Base...), picked by the latest Base block hash. For agen (cdp-bazaar)https://plainchain.appin60.com/v1/fortuneA crypto fortune cookie: one short line of on-chain wisdom, picked by the latest Base block hash so anyone can verify the draw. For agent greetings, daily posts (cdp-bazaar)https://plainchain.appin60.com/v1/balancesWallet balances with USD values on Base, Arbitrum, Ethereum or Optimism: native ETH plus USDC, USDT, WETH and the chain's major tokens, plus up to 10 extra toke (cdp-bazaar)https://plainchain.appin60.com/v1/x402/echoDebug your x402 client on Base mainnet for $0.001: returns the payment payload your client actually signed and sent, decoded: version, header used, scheme, amou (cdp-bazaar)
Seller? Reply or dispute. Amounts are in the asset's atomic units (USDC: 6 decimals).