other · Listed · eip155:8453 · Found · 49 endpoints · Gateway-eligible
underground.substratesymposium.com
underground
X402 endpoints at underground.substratesymposium.com.
Indexed from this operator's public /.well-known/x402.json. Found is not operator-owned and is not attested. Claim or opt out.
Agent Read · Cleared Index
ROUTE
Route when you need other at published x402 prices.
confidence
78%
source
signal
Index before you pay. Same payload for agents:
GET /api/cleared/agent-read?slug=cat-underground-substratesymposium-com
When to call
- Need other via x402 and want Cleared-indexed payTo with a live scorecard.
- X402 endpoints at underground.substratesymposium.com.
Risks
- Found — not operator-owned; claim status unknown.
- No Cleared settlement receipt on file yet.
- No Gateway traffic yet — market share unproven.
Price posture
49 endpoints — price unknown on manifest; confirm before pay.
Category · Gateway
other · no Gateway routes yet — early / unproven on Cleared market share.
Endpoint hints
GET /api/x402-operator-censusSigned merchant-side census of x402 operators observed since April 2026 (188+ named operators by class, with payment behaviour). Ed25519-signed CC0 corpus.
GET /api/mirrorMirror v2 — your x402 client, seen from the merchant seat. Caller-focused signed report with verdict ladder, class_comparison, diagnostic_recommendations, live
GET /api/x402-failure-corpusClassified failure-mode taxonomy (literal path templates, method mismatch, index substitution, unresolved interpolation, slug guessing) with per-signature count
GET /api/x402-conformance/self/cardThe x402 Client Report Card. The calling agent gets a signed grade (A/B/C/D/F/I) + itemized findings + 30-day Ed25519-signed SVG badge about its OWN x402 client
GET /api/decodeURL structured-decoder. Pass ?url=<target>; receive typed CleanRead JSON + Ed25519 attestation. SSRF-guarded fetch. For pre-flighting a URL before committing to
GET /api/merchant-keyCertify Your Wallet + MerchantKey. Signed attestation your client completed full x402 v2 flow end-to-end, plus @maraventano/map read module source inline.
GET /api/bartender-benchmarkAppend a bet to the public append-only agent-economy ledger. Signed attestation with ledger position + date. A dollar says yes.
GET /api/data-dailySigned daily snapshot of the Underground merchant seat: hits, buy attempts, payments completed, unique named operators + breakdown. CC0 for citation.
Evidence (Cleared)
- → Intake verified · Gateway-eligible
- → Trust 70/100 · pass · tier listed
- → Protocol x402 · eip155:8453
- → Manifest reachable · schema valid
- → Found listing — indexed from public x402.json, not operator-attested.
Endpoints
endpoint-1
unknownGET https://underground.substratesymposium.com/api/x402-operator-censusSigned merchant-side census of x402 operators observed since April 2026 (188+ named operators by class, with payment behaviour). Ed25519-signed CC0 corpus.
endpoint-2
unknownGET https://underground.substratesymposium.com/api/mirrorMirror v2 — your x402 client, seen from the merchant seat. Caller-focused signed report with verdict ladder, class_comparison, diagnostic_recommendations, live conformance check, and headline merchant-window summary. Full roster + full taxonomy sold separately as Operator Census and Failure Corpus.
endpoint-3
unknownGET https://underground.substratesymposium.com/api/x402-failure-corpusClassified failure-mode taxonomy (literal path templates, method mismatch, index substitution, unresolved interpolation, slug guessing) with per-signature counts and unique-IP spreads; probe-only operator roster; anonymous nonpayer aggregate. The merchant-side ground truth the arXiv security papers lack.
endpoint-4
unknownGET https://underground.substratesymposium.com/api/x402-conformance/self/cardThe x402 Client Report Card. The calling agent gets a signed grade (A/B/C/D/F/I) + itemized findings + 30-day Ed25519-signed SVG badge about its OWN x402 client behaviour measured from this merchant seat.
endpoint-5
unknownGET https://underground.substratesymposium.com/api/decodeURL structured-decoder. Pass ?url=<target>; receive typed CleanRead JSON + Ed25519 attestation. SSRF-guarded fetch. For pre-flighting a URL before committing to a payment.
endpoint-6
unknownGET https://underground.substratesymposium.com/api/merchant-keyCertify Your Wallet + MerchantKey. Signed attestation your client completed full x402 v2 flow end-to-end, plus @maraventano/map read module source inline.
endpoint-7
unknownGET https://underground.substratesymposium.com/api/bartender-benchmarkAppend a bet to the public append-only agent-economy ledger. Signed attestation with ledger position + date. A dollar says yes.
endpoint-8
unknownGET https://underground.substratesymposium.com/api/data-dailySigned daily snapshot of the Underground merchant seat: hits, buy attempts, payments completed, unique named operators + breakdown. CC0 for citation.
Checks
reachable
valid
2026-10-08T06:32:45.588Z
No settlement evidence found in chain signals.
Gateway routing
Score ≥70/100 — Cleared attestation pass. Route via Gateway before pay.
Claim this listing to upgrade to Cleared attestation.
Claim listing