x402 census · hcad-api.canvas-cart.workers.dev · 905aacee5583 · JSON
GET /parcel/:acct/history
live
Every tax year's assessed, appraised, and market value for one Harris County parcel. Get the acct from GET /search?addr=<street>. Raw HCAD roll values, verbatim, no interpretation.
Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://hcad-api.canvas-cart.workers.dev/parcel/:acct/history |
| Method | GET |
| Price | $0.02 USDC = 20000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xA40Dadc75B69bEe8325E8089258235213293F8F4 |
| Seller | hcad-api.canvas-cart.workers.dev |
| Catalogs | cdp (row updated 2026-09-07) |
| Listed since (lower bound) | 2026-09-07 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-07 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-07 (catalog-reported, not verified on chain) |
| Category (keyword rule) | other/unknown |
| Templated path | yes: contains :param or {param}; probed as listed |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T00:13:18.000Z (cron) |
| Verdict now | live changed from unprobed |
| HEAD / GET | 404 / 402 |
| accepts[0] | {"scheme":"exact","network":"eip155:8453","amount":"20000","payTo":"0xA40Dadc75B69bEe8325E8089258235213293F8F4","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}} |
| Live amount equals catalog price | yes |
| Latency | 1,155 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 4 |
| Payments | 50 |
| USDC volume | $0.57 |
| Median payment | n/a |
| First / last payment | 2026-09-04 / 2026-09-24 |
| Sampler-shaped share of payments | n/a |
| Payers that are not samplers | n/a |
| Source | blockscout-sample — newest page of inbound ERC-20 transfers only (<=50); counts are a floor, not a total |
| Address | 0xA40Dadc75B69bEe8325E8089258235213293F8F4 |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"pathParams": {
"acct": "0010090000001"
},
"queryParams": {},
"type": "http"
},
"output": {
"type": "json",
"example": {
"acct": "0010020000001",
"years": [
{
"assessed_val": 299000,
"tax_year": 2025,
"total_market_val": 300000
},
{
"assessed_val": 310165,
"tax_year": 2026,
"total_market_val": 310165
}
]
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://hcad-api.canvas-cart.workers.dev/parcel/:acct/history' -H 'accept: application/json'
The catalog declares GET. 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/905aacee5583/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"905aacee5583"} 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 hcad-api.canvas-cart.workers.dev.