EVM & Solana Utility Tools
chain-tools.use.x402atlas.com · 7 paid endpoints · listed 2026-10-27
Keccak Merkle proof verifier — validate inclusion plus exact leaf index and count proof shape for the Atlas sorted-pair tree profile.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| POST | chain-tools.use.x402atlas.com/evm/abi-decode Strict Solidity ABI calldata decoder — decode canonical EVM smart-contract function calls or typed values, verify selectors, and reject ambiguous offsets or pad | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/evm/abi-encode Solidity ABI calldata encoder — encode canonical typed values for an EVM smart-contract function call, with an optional selector and exact 256-bit integers. | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/evm/address-checksum EVM address checksum and validation tool — normalize one Ethereum-compatible address and validate mixed-case EIP-55 input offline. | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/evm/create2 CREATE2 deterministic contract address calculator — derive the EIP-1014 EVM deployment address, preimage, hashes, and EIP-55 checksum offline without RPC. | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/merkle/verify Keccak Merkle proof verifier — validate inclusion plus exact leaf index and count proof shape for the Atlas sorted-pair tree profile. | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/solana/pda Solana Program Derived Address (PDA) calculator — derive the canonical off-curve address and bump from bounded public seeds offline, without RPC or key handling | $0.005 | Polygon, Arbitrum, Base, Solana |
| POST | chain-tools.use.x402atlas.com/merkle/build Keccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with domain separation and explicit odd-node promotion. | $0.01 | Polygon, Arbitrum, Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 5 days ago | chain-tools.use.x402atlas.com/evm/abi-decode | 402 | 438 | valid x402 v2 terms |
Income on Base (7 days)
This provider's payout address is shared by several providers, so its income is not shown as its own.
Is this your API?
<a href="https://logicnodes.io/observatory/p/chain-tools.use.x402atlas.com"><img src="https://logicnodes.io/observatory/badge/chain-tools.use.x402atlas.com.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/chain-tools.use.x402atlas.com