block402-xyz

Block402 offers a pay‑per‑request API that provides read‑only blockchain intelligence for AI agents. It supplies Ethereum and Bitcoin mainnet data, including balances, blocks, transactions, receipts, logs and proofs, accessed via JSON‑RPC calls. Payments are made in USDC on Base mainnet using the x402 protocol, with no subscription or credit‑card requirement.

block402-xyz publishes 1 API contract indexed on the APIs.io network: Bitcoin API. Tagged areas include Blockchain, AI Agents, Ethereum, Bitcoin, and Pay‑per‑request.

The block402-xyz catalog on APIs.io includes 1 Spectral governance ruleset.

block402-xyz’s developer surface includes getting-started guide, API reference, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.5/100 emerging Agent 27/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract

Blockchain AI Agents Ethereum BitcoinPay‑per‑requestUSDC x402

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 22.5/100 · emerging

Contract Quality 10.5 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.3 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 9.5 — up to +18.1 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/block402-xyz/apis.yml: open an issue on github.com/api-evangelist/block402-xyz to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

block402-xyz Bitcoin API

The Bitcoin API from block402-xyz — 1 operation(s) for bitcoin.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

block402-xyz API Rules

45 rules · 43 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Block402 Xyz Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Block402 Xyz Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

Vocabulary

Idempotency

Conventions

ErrorCatalog

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: block402-xyz
name: block402-xyz
description: Block402 offers a pay‑per‑request API that provides read‑only blockchain intelligence for AI agents. It supplies
  Ethereum and Bitcoin mainnet data, including balances, blocks, transactions, receipts, logs and proofs, accessed via JSON‑RPC
  calls. Payments are made in USDC on Base mainnet using the x402 protocol, with no subscription or credit‑card requirement.
url: https://artifacts.apis.io/block402-xyz/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Blockchain
- AI Agents
- Ethereum
- Bitcoin
- Pay‑per‑request
- USDC
- x402
tags_raw:
- Blockchain
- API
- AI Agents
- Ethereum
- Bitcoin
- Pay‑per‑request
- USDC
- x402
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/block402-xyz-agentic-access.yml
- type: Spectral
  url: rules/block402-xyz-rules.yml
- type: Vocabulary
  url: vocabulary/block402-xyz-vocabulary.yml
- type: Idempotency
  url: conventions/block402-xyz-conventions.yml
- type: Conventions
  url: conventions/block402-xyz-conventions.yml
- type: ErrorCatalog
  url: errors/block402-xyz-problem-types.yml
- type: Conformance
  url: conformance/block402-xyz-conformance.yml
- type: LLMsTxt
  url: llms/block402-xyz-llms.txt
- type: Hosts
  url: hosts/block402-xyz-hosts.yml
- type: Vendors
  url: vendors/block402-xyz-vendors.yml
- type: GettingStarted
  url: https://block402.xyz/agents/
- type: APIReference
  url: https://block402.xyz/docs/api.md
- type: DomainSecurity
  url: security/block402-xyz-domain-security.yml
- type: Website
  url: https://block402.xyz/
apis:
- aid: block402-xyz:block402-xyz-bitcoin-api
  name: block402-xyz Bitcoin API
  description: The Bitcoin API from block402-xyz — 1 operation(s) for bitcoin.
  humanURL: https://block402.xyz/docs/api.md
  baseURL: https://api.block402.xyz
  tags:
  - Bitcoin
  properties:
  - type: OpenAPI
    url: openapi/block402-xyz-bitcoin-api-openapi.yml
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

block402-xyz API — frequently asked questions

Does block402-xyz have an API?

Yes. APIs.io lists 1 API from block402-xyz, including block402-xyz Bitcoin API.

Is there an OpenAPI specification for the block402-xyz API?

Yes. APIs.io indexes 1 OpenAPI specification for block402-xyz, each linked for download from this page.

Is the block402-xyz API ready for AI agents?

block402-xyz has a Kin Score of 22.5 out of 100 (emerging) and an Agent Readiness score of 27.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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