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💰 Paid API

bitcoin.x420.dev

bitcoin.x420.dev · bitcoin.x420.dev

Buy custom USDC amount worth of BITCOIN tokens 0xc41338b5Aff79e763c91ef550D15e1Cf92D64b07

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Verify the domain bitcoin.x420.dev 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 — 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: 2026-09-08 16:38
      
        Last success: 2026-09-08
      
        Status: 404

Raw error

HTTP 404

Trust score

40/100

grade D · 9 criteria

Uptime

0.0%

9 direct probes · 30d

Observed inflow · 30d

—

no payment wallet declared

Dispute or improve this rating

D

Conformance score: 40/100

D-grade: significant issues, auth-gated, partially broken, or stale.

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).

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

0/9 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 →

partial Skill declaration 6/10

Declares 1 skill, usable but thin.

            How to earn +4 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: bitcoin.x420.dev (https://bitcoin.x420.dev). 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.

Activity (audit trail)

last 24h · 0 invocations 100.0% success Public aggregate · no PII recorded

invocations 7d

reached the endpoint through us

lookups 7d

our API answered about it

impressions 7d

appeared in a result list

Per event type (7d)

search_click

Recent events (last 20)

When	Event	Method	Status	Latency
2026-09-08T19:07:41	search_click	`/agents`	— ok	4ms
2026-09-07T22:46:07	search_click	`/agents`	— ok	1ms
2026-09-07T16:19:14	search_click	`/agents`	— ok	2ms
2026-09-07T13:39:51	search_click	`/agents`	— ok	1ms
2026-09-03T22:46:22	search_click	`/agents`	— ok	2ms
2026-09-01T22:46:03	search_click	`/agents`	— ok	1ms

Uptime

0.0%

9 direct probes · 30d

Response

—

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base per call USDC Third-party catalog Dispute or improve this rating

From $5.0000 per call

Endpoint	Price	Currency
`https://bitcoin.x420.dev/api/puff-custom`	5.0	USDC

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

Agent card	`https://bitcoin.x420.dev/.well-known/agent-card.json`
Provider	https://bitcoin.x420.dev
Docs	https://bitcoin.x420.dev

Discovered via

agentic_market recrawl_warm

Skills · 1 declared · mapped to canonical taxonomy

bitcoin.x420.dev

Buy custom USDC amount worth of BITCOIN tokens 0xc41338b5Aff79e763c91ef550D15e1Cf92D64b07

canonical X402 Usdc Payments match 87%

Health · last 3 probes

When	HTTP	Live JSON-RPC	Latency
2026-08-17 14:40:41	404	—	—
2026-08-16 14:42:25	404	—	—
2026-08-12 02:17:44	404	—	—

Who's calling this agent 30d

7 interactions captured (impressions + lookups + A2A calls)

By AI host (caller_kind) · top 3

OAI-SearchBot 5 (71%)

ClaudeBot (training crawler) 2 (29%)

Caller geography · top 3

US 7

Via which API surface · top 3

web 7

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.

Cheaper or better alternatives per-skill

      
      ↓ 1 skill cheaper elsewhere
      
      ↑ 1 higher quality
      
      peak save 100.0%

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

X402 Usdc Payments agent_skills

50 other agents serve this

↓ Cheaper alternative save 100.0%

402-server.pinata-marketing-enterprise.workers.dev

↑ Higher quality +55pts

wolframalpha.x402.paysponge.com

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        x420.dev · q 45%
      

Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/bitcoin.x420.dev.svg)](https://agenstry.com/agents/bitcoin.x420.dev)
[![Verified Business](https://agenstry.com/badge/bitcoin.x420.dev/identity.svg)](https://agenstry.com/agents/bitcoin.x420.dev)
[![Uptime](https://agenstry.com/badge/bitcoin.x420.dev/uptime.svg)](https://agenstry.com/agents/bitcoin.x420.dev)
[![A2A version](https://agenstry.com/badge/bitcoin.x420.dev/protocol.svg)](https://agenstry.com/agents/bitcoin.x420.dev)

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": "agentic.market",
  "service": {
    "id": "bitcoin-x420-dev",
    "name": "bitcoin.x420.dev",
    "description": "",
    "domain": "bitcoin.x420.dev",
    "provider": "bitcoin.x420.dev",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://bitcoin.x420.dev/api/puff-custom",
        "description": "Buy custom USDC amount worth of BITCOIN tokens 0xc41338b5Aff79e763c91ef550D15e1Cf92D64b07",
        "pricing": {
          "amount": "5",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "",
        "providerName": "",
        "parameters": [],
        "serviceName": "",
        "tags": [],
        "quality": null
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "5",
      "maxAmount": "5",
      "avgCostPerTransaction": "5",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [],
    "iconUrl": ""
  }
}

Activity (audit trail)

Endpoints

Skills · 1 declared · mapped to canonical taxonomy

Health · last 3 probes

Who's calling this agent 30d

Cheaper or better alternatives per-skill

Similar agents embedding-nearest

Embed your Agenstry badge

Audit-grade evidence bundle

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