💰 Paid API data

402Signal

402signal.com · 402signal.com

Fail-closed x402 router across Base, Solana, and Algorand. Authorize $0.003 USDC; settlement occurs only when a valid, current, live, eligible route is returned. Normal typed misses cost $0. The buyer keeps its wallet and keys; seller payment is separate.

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Verify the domain 402signal.com 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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Our probe of this card is currently failing

Last probe error: gate: missing url

      
        Last attempt: 2026-09-08 16:39
      
        Last success: 2026-09-08
      
        Status: 200

1 thing in this card we could not use

Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://402signal.com/.well-known/mcp.json and the next probe clears this panel.

Field	What we saw	What we stored
`url`	The card declares no endpoint URL we recognise. A2A v1.0 puts it in supportedInterfaces[].url; v0.x used a top-level url. Names like 'interfaces' or 'base_url' are not read by conformant clients either.	dropped — we read the card but cannot list this agent as callable

Trust score

33/100

grade F · 9 criteria

Uptime

0.0%

8 direct probes · 30d

Observed inflow · 30d

Dispute or improve this rating

F

Conformance score: 33/100

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

click to expand breakdown ▾ click to collapse breakdown ▴

partial Valid AgentCard 9/10

AgentCard did not read cleanly: 1 field we could not read. Scored on what we could read, not on a card that arrived as published — the card findings name every affected field and what we did with it.

            How to earn +1 point
          

Publish a parseable A2A AgentCard

Serve a valid AgentCard JSON at /.well-known/agent-card.json. The A2A 1.0 schema is the reference; we accept the v0.x backwards-compatible variant too.

Docs →

partial Live JSON-RPC 15/25

Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.

            How to earn +10 points
          

Respond live on JSON-RPC

Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.

Docs →

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).

fail Uptime track record 0/15

0/8 probes succeeded (0% uptime).

            How to earn +15 points
          

Stabilise uptime

We probe every agent on a tiered schedule and grade the last 30 days. Sustained 99 %+ uptime over 20+ conclusive probes scores full points. Probes you refuse us (HTTP 429/403, a WAF challenge, robots.txt) no longer count against you either way, so what is left is genuine unavailability — usually a 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: 402signal.com (https://402signal.com/). 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 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Uptime

0.0%

8 direct probes · 30d

Response

142ms

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

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

From $0.0030 per call

Endpoint	Price	Currency
`https://402signal.com/route`	0.003	USDC

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

Settlement wallet: 0xb18fc2275f36dae99eb215caeff03b431f887d16 · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $5.02
                

3 calls

Last 30d

                  $5.02
                

3 calls

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

Daily 30-day observed-inflow history ~ flat (+0.0%)

2026-08-30 2026-09-07

Peak day: $5.02 Data points: 9 Total tx (30d window): 3

Agent card	`https://402signal.com/.well-known/mcp.json`
Provider	https://402signal.com/
Docs	https://402signal.com

Discovered via

agentic_market cdp_discovery manifests x402_list

Health · last 8 probes

When	HTTP	Live JSON-RPC	Latency
2026-09-02 02:52:29	200	—	142ms
2026-09-01 11:23:27	200	—	203ms
2026-09-01 05:00:11	200	—	122ms
2026-08-31 22:53:38	200	—	128ms
2026-08-31 17:07:53	200	—	123ms
2026-08-31 10:02:24	200	—	121ms
2026-08-31 03:24:36	200	—	198ms
2026-08-30 21:23:50	200	—	130ms

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Embed your Agenstry badge

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Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/402signal.com.svg)](https://agenstry.com/agents/402signal.com)
[![Verified Business](https://agenstry.com/badge/402signal.com/identity.svg)](https://agenstry.com/agents/402signal.com)
[![Uptime](https://agenstry.com/badge/402signal.com/uptime.svg)](https://agenstry.com/agents/402signal.com)
[![A2A version](https://agenstry.com/badge/402signal.com/protocol.svg)](https://agenstry.com/agents/402signal.com)

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": "402signal",
  "endpoint_count": 1,
  "attribution": "Data: x402-list.com (CC BY 4.0)"
}

Activity (audit trail)

Endpoints

Health · last 8 probes

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