Parkland Archives — agent-tools.cloud

Structured historical data from verified primary sources — 1900 Sears catalog prices, World Almanac statistics, and more. Queryable by AI agents via x402 micropayments on Base.

Paid verification

How it works

No sponsored paid call yet.

Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.

Quality grade

How grading works

B 64.8 / 100

Availability 20.0 / 20

Endpoint responded (HTTP 402)

Payability 15.0 / 15

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 6.3 / 35

8 distinct payers, 51 USDC transfers in the last 30 days; the wallet is shared by 5 listings, so each is credited 1/5

Performance 9.5 / 10

Last probe answered in 286 ms (full marks at 200 ms or less)

Readiness 14.0 / 15

Agent readiness 93/100

Owner verified 0.0 / 5

Nobody has claimed this listing yet

Endpoint last checked 18 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

A · 93/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 64.8/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements	10/10	Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge	25/25	Paid endpoint answers with an HTTP 402 challenge (286 ms).
x402 version	n/a	x402 version not observed yet.
Signed descriptor	n/a	No x402 standard defines a signed descriptor.
Uptime (30 days)	15/15	32/32 probes succeeded over 30 days (100%).
Resource declaration	10/10	Declares 10 paid resource(s).
Verified identity	5/10	Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags	5/5	seen in a source within 7 days; declares x402.
Security declaration	n/a	Payment is the access control for an x402 resource.

Applicable criteria total 75 points, scaled to 100.

Responsiveness: Responsive (286 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 94% of peers; This listing 93 · peer median 78
Latency: Faster than 37% of peers; This listing 286 ms · peer median 205 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.

How many agent tools actually work · All statistics

Paid endpoints

10 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

GET https://history.parklandarchives.com/api/catalog-prices

Search the 1900 Sears, Roebuck & Co. catalog by keyword, category, or item. Returns product name, price in 1900 USD, materials, item number, and source page link.

GET https://history.parklandarchives.com/api/catalog-prices/item

Look up one specific Sears catalog item by its catalog number. Cheapest endpoint -- for when the agent already knows exactly what it wants.

GET https://history.parklandarchives.com/api/catalog-prices/summary

Computed price stats across a category: average, min, and max in 1900 USD. For queries like 'what did bicycles cost on average?'

GET https://history.parklandarchives.com/api/catalog-prices/modern-value

Converts a 1900 Sears price to today's dollars using the Minneapolis Federal Reserve Consumer Price Index (1800-present). The only endpoint backed by U.S. government CPI data.

GET https://history.parklandarchives.com/api/almanac-records

Search the 1900 World Almanac for named statistics: election results, population figures, postal rates, trade figures, military numbers, and more.

GET https://history.parklandarchives.com/api/bulk/almanac

Full Almanac dataset in one purchase -- thousands of verified records in a single JSON response.

GET https://history.parklandarchives.com/api/bulk/catalog

Full Sears catalog dataset in one purchase -- all verified price records in a single JSON response.

GET https://history.parklandarchives.com/.well-known/x402

Machine-readable endpoint catalog for AI agents and directory crawlers. Lists all paid and free endpoints with prices and descriptions.

GET https://history.parklandarchives.com/api/catalog-prices/sample

Free sample -- returns up to 5 catalog records without payment. Used for public demos and agent toolchain discovery.

GET https://history.parklandarchives.com/.well-known/x402-stats

Conversion funnel stats for every endpoint: total requests, 402 challenges, and settled payments since last server restart.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://history.parklandarchives.com/api/almanac-records  # expect HTTP 402 Payment Required (about $0.01/call)

/.well-known/x402.json

https://history.parklandarchives.com/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-09-13