x402 census · chain-tools.use.x402atlas.com · 8f9638c03bcf · JSON
POST /evm/address-checksum
unprobed
EVM address checksum and validation tool — normalize one Ethereum-compatible address and validate mixed-case EIP-55 input offline.
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://chain-tools.use.x402atlas.com/evm/address-checksum |
| Method | POST |
| Price | $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts eip155:137, eip155:42161 |
| payTo | 0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2 |
| Seller | chain-tools.use.x402atlas.com |
| Catalogs | cdp (row updated 2026-09-15) |
| Listed since (lower bound) | 2026-09-15 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-15 |
| CDP quality counters | 2 calls and 1 unique payers in 30 days, last call 2026-09-15 (catalog-reported, not verified on chain) |
| Category (keyword rule) | dev-tools/utilities |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | EVM & Solana Utility Tools · eip-55, address-checksum, evm, address-validation, blockchain-development |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 12 |
| Payments | 46 |
| USDC volume | $0.47 |
| Median payment | $0.005 |
| First / last payment | 2026-07-27 / 2026-09-29 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"address": "0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"algorithm_version": "eip55-address-v1",
"checksum": "0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed",
"input_checksum_valid": true,
"lowercase": "0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed",
"operation": "address-checksum",
"warnings": []
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://chain-tools.use.x402atlas.com/evm/address-checksum' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/8f9638c03bcf/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"8f9638c03bcf"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on chain-tools.use.x402atlas.com.