maraventanoindex.com — agent-tools.cloud

Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed25519 attestation. Pay $0.01 USDC on Base or Solana per call. Call it before every transaction to check if a counterparty has ever paid at this merchant seat. Wallet-based lookup ...

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

A 76.4 / 100

Availability 20.0 / 20

Endpoint responded (HTTP 200)

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 18.4 / 35

87 distinct payers, 698 USDC transfers in the last 30 days; the wallet is shared by 3 listings, so each is credited 1/3

Performance 10.0 / 10

Last probe answered in 175 ms (full marks at 200 ms or less)

Readiness 13.0 / 15

Agent readiness 87/100

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

B · 87/100

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 A, 76.4/100), 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	20/25	Endpoint reachable; its 402 challenge was seen earlier (175 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 8 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 (175 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, bazaar_feed. 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 75% of peers; This listing 87 · peer median 78
Latency: Faster than 59% of peers; This listing 175 ms · peer median 205 ms

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

Live 402 challenge −5 — Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (175 ms).
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

8 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://maraventanoindex.com/api/report/founding

The Founding Report — the full Apr 6-Sep 8 2026 record (156 days from go-live). A signed bundle: report PDF + File 1 observational dataset (1,096,694 request-level records) + Ed25519-signed integrity manifest + data dictionary + Appendix B (133 on-chain settlements). Delivered on verified settlement

GET https://maraventanoindex.com/api/report/30day

The 30-Day Report (Edition V.1: Sep 9-Oct 8 2026, four x402 virtual hosts). A signed bundle: report PDF + File 1 observational dataset (306,799 request-level records) + Ed25519-signed integrity manifest + data dictionary + Appendix B (49 on-chain settlements). Delivered on verified settlement as an

GET-OR-POST https://maraventanoindex.com/api/x402-operator-census

Signed longitudinal roster of 250+ named x402 operators observed from a continuously-operated merchant seat since April 2026, with class, request counts, payment-attached counts, and settlement attribution. Independently replicable (two from-scratch extractions on 2026-10-03 produced the same funnel

GET-OR-POST https://maraventanoindex.com/api/x402-operator-census/lookup

Per-call counterparty check. Pass ?ua=<counterparty-UA>; receive one signed row with verdict (known_payer | probe_only | low_signal | unknown). Call before every transaction.

GET-OR-POST https://maraventanoindex.com/api/mirror

Full merchant-side telemetry corpus + your_client reflection — what the merchant seat has recorded about YOUR user-agent with live conformance check.

GET-OR-POST https://maraventanoindex.com/api/x402-failure-corpus

Classified failure-mode taxonomy with per-signature request counts and unique-IP spreads; probe-only operator roster; anonymous nonpayer aggregate. Merchant-side ground truth.

GET-OR-POST https://maraventanoindex.com/api/x402-conformance/self/card

The x402 Client Report Card. Signed grade (A/B/C/D/F/I) + itemized findings + 30-day Ed25519-signed SVG badge about YOUR OWN client behaviour.

GET https://maraventanoindex.com/api/data-daily

Signed daily snapshot of the merchant seat: nginx hits, buy attempts, payments completed, unique named operators + class breakdown. CC0 for citation.

How to call

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

curl -sS -i -X GET https://maraventanoindex.com  # expect HTTP 402 Payment Required (about $0.01/call)

/.well-known/x402.json

https://maraventanoindex.com/.well-known/x402

Listed in

Directories this entry was found in.

cdp-bazaar since 2026-10-04 a2a since 2026-10-18 x402 since 2026-10-19