💰 Paid API data

Groundcheck

groundcheck.seiche.info · groundcheck.seiche.info

Groundcheck is verified enrichment for AI agents. Send a factual claim and it returns a machine verified verdict with a confidence score and cited sources, grounded against live web sources. Identity protocols verify who an agent is; Groundcheck verifies what it says. Single claim grounding is free. Paid endpoints over x402: claim extraction and instrument resolution at 0.005 USDC, document grounding at 0.02, and delivery attestation at 0.05, which returns a signed receipt binding the x402 payment to the delivered content, verifiable offline. v1 and v2 both accepted. No account and no API key.

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Verify the domain groundcheck.seiche.info via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.

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🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch

Our probe of this card is currently failing — 404 not found

We tried /.well-known/agent-card.json and got a 404. Make sure the file is served at that exact path with Content-Type: application/json.

      
        Last attempt: 2026-08-13 15:43
      
        Last success: 2026-08-13
      
        Status: 404

Raw error

HTTP 404

Trust score

28/100

grade F · 9 criteria

Uptime

60.0%

60 probes

Observed inflow · 30d

$0.00

wallet active · no inflow

Dispute or improve this rating

F

Conformance score: 28/100

F-grade: card is reachable but fails most operational signals.

click to expand breakdown ▾ click to collapse breakdown ▴

pass Valid AgentCard 10/10

Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).

info Live JSON-RPC 0/25

Live probe hasn't run yet.

fail Protocol version 0/10

No protocolVersion in card.

            How to earn +10 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.

Docs →

info JWS signature 0/10

Card is unsigned (most published agents are).

partial Uptime track record 9/15

36/60 probes succeeded (60% uptime).

            How to earn +6 points
          

Stabilise uptime

We probe every agent on a tiered schedule. Sustained 99 %+ uptime over 20+ checks scores full points. Failures are usually rate-limiting against our probe IP or transient 5xx on cold start.

Docs →

fail Skill declaration 0/10

No skills declared in card. Hard to route to.

            How to earn +10 points
          

Declare your skills

Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.

Docs →

partial Verified Identity 5/10

Provider declared: groundcheck.seiche.info (https://groundcheck.seiche.info). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.

            How to earn +5 points
          

Verify your domain ownership

Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.

Docs →

pass Freshness + modern flags 4/5

seen in upstream source within 0d

info Security declaration 0/5

Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 calls Public aggregate · no PII recorded

calls 24h

calls 7d

search_impression 7d

Recent events (last 20)

When	Event	Method	Status	Latency
2026-08-11T03:22:38	search_impression	`—`	200 ok	—
2026-08-11T03:22:29	search_impression	`—`	200 ok	—

Uptime

60.0%

60 probes

Response

0ms

last probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base per call USD Facilitator feed Dispute or improve this rating

From $0.0050 per call

Endpoint	Price	Currency
`https://groundcheck.seiche.info/attest-delivery`	0.05	USDC
`https://groundcheck.seiche.info/check`	0.02	USDC
`https://groundcheck.seiche.info/extract`	0.005	USDC
`https://groundcheck.seiche.info/resolve`	0.005	USDC

Try it ↗ Opens the operator's playground / docs in a new tab.

Settlement wallet: 0x5b4a78b7efe482d1579e287da6f0043f89cf0ea1 · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $0.00
                

0 calls

Last 30d

                  $0.00
                

0 calls

USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.

Daily 30-day observed-inflow history

2026-08-07 2026-08-13

Peak day: $0.00 Data points: 7 Total tx (30d window): 0

Agent card	`https://groundcheck.seiche.info/.well-known/agent-card.json`
Provider	https://groundcheck.seiche.info
Docs	https://groundcheck.seiche.info/attest-delivery

Discovered via

cdp_discovery agentic_market mcp_registry x402_list

Health · last 24 probes

When	HTTP	Live JSON-RPC	Latency
2026-08-13 07:26:54	404	—	—
2026-08-12 19:41:50	404	—	—
2026-08-12 05:55:21	404	—	—
2026-08-11 10:36:37	404	—	—
2026-08-10 17:24:19	404	—	—
2026-08-10 11:23:55	404	—	—
2026-08-09 07:52:12	404	—	—
2026-08-08 17:38:32	404	—	—
2026-08-08 09:48:51	404	—	—
2026-08-08 03:06:20	404	—	—

Who's calling this agent 30d

2 interactions captured (impressions + lookups + A2A calls)

By AI host (caller_kind) · top 3

curl 2 (100%)

Caller geography · top 3

US 2

Via which API surface · top 3

rest 2

Public teaser: top-3 per dimension only. Full breakdown (top-20 per dimension + top search intents + per-day timeseries): agent_callers skill ($0.05/call, $0 on Enterprise). Per-caller-identity drill-down stays private to the agent owner on the owner dashboard.

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Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/groundcheck.seiche.info.svg)](https://agenstry.com/agents/groundcheck.seiche.info)
[![Verified Business](https://agenstry.com/badge/groundcheck.seiche.info/identity.svg)](https://agenstry.com/agents/groundcheck.seiche.info)
[![Uptime](https://agenstry.com/badge/groundcheck.seiche.info/uptime.svg)](https://agenstry.com/agents/groundcheck.seiche.info)
[![A2A version](https://agenstry.com/badge/groundcheck.seiche.info/protocol.svg)](https://agenstry.com/agents/groundcheck.seiche.info)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "_source": "x402_list",
  "slug": "groundcheck",
  "endpoint_count": 4,
  "attribution": "Data: x402-list.com (CC BY 4.0)"
}

Activity (audit trail)

Endpoints

Health · last 24 probes

Who's calling this agent 30d

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Audit-grade evidence bundle

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