x402 Agent Services

x402 Agent Services provides pay‑per‑call APIs for AI agents on Base mainnet, settled in USDC via the x402 protocol v2. It offers a suite of utilities such as text‑to‑structure, agent‑jobs aggregation, FX rates, email verification, phone lookup, wallet lookup, crypto fear‑greed index, web content extraction, SSL checks, domain lookup, QR code generation, SEC company facts, language detection, timestamp conversion, hash tools, integration packs, and on‑chain DEX quotes. All endpoints are billed per call in USDC and run on first‑party infrastructure without upstream dependencies, enabling deterministic, low‑latency data for autonomous agents.

x402 Agent Services publishes 21 API contracts indexed on the APIs.io network, including Agent Jobs API, Dex Quote API, Domain Lookup API, and 18 more. Tagged areas include Artificial Intelligence, Payments, Cryptocurrency, Data, and Services.

The x402 Agent Services catalog on APIs.io includes 1 Spectral governance ruleset.

x402 Agent Services’ developer surface includes pricing and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

24.2/100 emerging Agent 22/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract

Artificial Intelligence Payments Cryptocurrency Data Services

Kin Score

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

Composite quality — 24.2/100 · emerging

Contract Quality 10.2 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 4.5 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 5.3 / 9

Regulatory Posture 1.4 / 15

Agent readiness — 22/100 · 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 0 / 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 8 / 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 Payments 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/call402-com/"><img src="https://apis.io/badge/call402-com/card.svg" alt="x402 Agent Services on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
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):

Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 26.3 — up to +14.7 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/call402-com/apis.yml: open an issue on github.com/api-evangelist/call402-com 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 2

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.

Agent2Agent

measured — observed by APIs.io (flavored)

OpenAPI

measured — observed by APIs.io (published)

APIs 21

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

x402 Agent Services Agent Jobs API

The Agent Jobs API from x402 Agent Services — 1 operation(s) for agent jobs.

x402 Agent Services Dex Quote API

The Dex Quote API from x402 Agent Services — 1 operation(s) for dex quote.

x402 Agent Services Domain Lookup API

The Domain Lookup API from x402 Agent Services — 1 operation(s) for domain lookup.

x402 Agent Services Email Verify API

The Email Verify API from x402 Agent Services — 1 operation(s) for email verify.

x402 Agent Services Fear Greed Index API

The Fear Greed Index API from x402 Agent Services — 1 operation(s) for fear greed index.

x402 Agent Services Fx Rates API

The Fx Rates API from x402 Agent Services — 1 operation(s) for fx rates.

x402 Agent Services Hash Tools API

The Hash Tools API from x402 Agent Services — 1 operation(s) for hash tools.

x402 Agent Services Health API

The Health API from x402 Agent Services — 1 operation(s) for health.

x402 Agent Services Language Detect API

The Language Detect API from x402 Agent Services — 1 operation(s) for language detect.

x402 Agent Services MCP API

The Mcp API from x402 Agent Services — 1 operation(s) for mcp.

x402 Agent Services Phone Lookup API

The Phone Lookup API from x402 Agent Services — 1 operation(s) for phone lookup.

x402 Agent Services Pricing API

The Pricing API from x402 Agent Services — 1 operation(s) for pricing.

x402 Agent Services Qr Code API

The Qr Code API from x402 Agent Services — 1 operation(s) for qr code.

x402 Agent Services Sec Company Facts API

The Sec Company Facts API from x402 Agent Services — 1 operation(s) for sec company facts.

x402 Agent Services Ssl Check API

The Ssl Check API from x402 Agent Services — 1 operation(s) for ssl check.

x402 Agent Services Stats API

The Stats API from x402 Agent Services — 1 operation(s) for stats.

x402 Agent Services Text Extract API

The Text Extract API from x402 Agent Services — 1 operation(s) for text extract.

x402 Agent Services Text To Structure API

The Text To Structure API from x402 Agent Services — 1 operation(s) for text to structure.

x402 Agent Services Timestamp Convert API

The Timestamp Convert API from x402 Agent Services — 1 operation(s) for timestamp convert.

x402 Agent Services Wallet Lookup API

The Wallet Lookup API from x402 Agent Services — 1 operation(s) for wallet lookup.

x402 Agent Services X402 Integration Pack API

The X402 Integration Pack API from x402 Agent Services — 1 operation(s) for x402 integration pack.

Scroll for all 21

x402 Agent Services API pricing

Prices published by x402 Agent Services.

Plan	Price
Standard	$0.002

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Call402 Com Plans Pricing

1 plans

PLANS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

x402 Agent Services API Rules

38 rules · 30 errors 2 warnings 6 info

SPECTRAL

Security Posture 1

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

Call402 Com Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Call402 Com Agentic Access

21 operations · 18 acting

AGENTIC

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: call402-com
name: x402 Agent Services
description: x402 Agent Services provides pay‑per‑call APIs for AI agents on Base mainnet, settled in USDC via the x402 protocol
  v2. It offers a suite of utilities such as text‑to‑structure, agent‑jobs aggregation, FX rates, email verification, phone
  lookup, wallet lookup, crypto fear‑greed index, web content extraction, SSL checks, domain lookup, QR code generation, SEC
  company facts, language detection, timestamp conversion, hash tools, integration packs, and on‑chain DEX quotes. All endpoints
  are billed per call in USDC and run on first‑party infrastructure without upstream dependencies, enabling deterministic,
  low‑latency data for autonomous agents.
url: https://artifacts.apis.io/call402-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Artificial Intelligence
- Payments
- Cryptocurrency
- Data
- Services
tags_raw:
- AI
- Payments
- Crypto
- Data
- Services
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/call402-com-agentic-access.yml
- type: Plans
  url: plans/call402-com-plans-pricing.yml
- type: Spectral
  url: rules/call402-com-rules.yml
- type: ErrorCatalog
  url: errors/call402-com-problem-types.yml
- type: Conformance
  url: conformance/call402-com-conformance.yml
- type: LLMsTxt
  url: llms/call402-com-llms.txt
- type: AgentCard
  url: a2a/call402-com-a2a.yml
- type: Hosts
  url: hosts/call402-com-hosts.yml
- type: Vendors
  url: vendors/call402-com-vendors.yml
- type: Pricing
  url: https://call402.com/pricing
- type: DomainSecurity
  url: security/call402-com-domain-security.yml
- type: Website
  url: https://call402.com/
apis:
- aid: call402-com:call402-com-agent-jobs-api
  name: x402 Agent Services Agent Jobs API
  description: The Agent Jobs API from x402 Agent Services — 1 operation(s) for agent jobs.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - agent-jobs
  tags_raw:
  - Agent Jobs
  properties:
  - type: OpenAPI
    url: openapi/call402-com-agent-jobs-api-openapi.yml
- aid: call402-com:call402-com-dex-quote-api
  name: x402 Agent Services Dex Quote API
  description: The Dex Quote API from x402 Agent Services — 1 operation(s) for dex quote.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Dex Quote
  properties:
  - type: OpenAPI
    url: openapi/call402-com-dex-quote-api-openapi.yml
- aid: call402-com:call402-com-domain-lookup-api
  name: x402 Agent Services Domain Lookup API
  description: The Domain Lookup API from x402 Agent Services — 1 operation(s) for domain lookup.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Domain Lookup
  properties:
  - type: OpenAPI
    url: openapi/call402-com-domain-lookup-api-openapi.yml
- aid: call402-com:call402-com-email-verify-api
  name: x402 Agent Services Email Verify API
  description: The Email Verify API from x402 Agent Services — 1 operation(s) for email verify.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Email Verify
  properties:
  - type: OpenAPI
    url: openapi/call402-com-email-verify-api-openapi.yml
- aid: call402-com:call402-com-fear-greed-index-api
  name: x402 Agent Services Fear Greed Index API
  description: The Fear Greed Index API from x402 Agent Services — 1 operation(s) for fear greed index.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Fear Greed Index
  properties:
  - type: OpenAPI
    url: openapi/call402-com-fear-greed-index-api-openapi.yml
- aid: call402-com:call402-com-fx-rates-api
  name: x402 Agent Services Fx Rates API
  description: The Fx Rates API from x402 Agent Services — 1 operation(s) for fx rates.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - FX Rates
  tags_raw:
  - Fx Rates
  properties:
  - type: OpenAPI
    url: openapi/call402-com-fx-rates-api-openapi.yml
- aid: call402-com:call402-com-hash-tools-api
  name: x402 Agent Services Hash Tools API
  description: The Hash Tools API from x402 Agent Services — 1 operation(s) for hash tools.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Hash Tools
  properties:
  - type: OpenAPI
    url: openapi/call402-com-hash-tools-api-openapi.yml
- aid: call402-com:call402-com-health-api
  name: x402 Agent Services Health API
  description: The Health API from x402 Agent Services — 1 operation(s) for health.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/call402-com-health-api-openapi.yml
- aid: call402-com:call402-com-language-detect-api
  name: x402 Agent Services Language Detect API
  description: The Language Detect API from x402 Agent Services — 1 operation(s) for language detect.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Language Detect
  properties:
  - type: OpenAPI
    url: openapi/call402-com-language-detect-api-openapi.yml
- aid: call402-com:call402-com-mcp-api
  name: x402 Agent Services MCP API
  description: The Mcp API from x402 Agent Services — 1 operation(s) for mcp.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - MCP
  tags_raw:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/call402-com-mcp-api-openapi.yml
- aid: call402-com:call402-com-phone-lookup-api
  name: x402 Agent Services Phone Lookup API
  description: The Phone Lookup API from x402 Agent Services — 1 operation(s) for phone lookup.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Phone Lookup
  properties:
  - type: OpenAPI
    url: openapi/call402-com-phone-lookup-api-openapi.yml
- aid: call402-com:call402-com-pricing-api
  name: x402 Agent Services Pricing API
  description: The Pricing API from x402 Agent Services — 1 operation(s) for pricing.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Pricing
  properties:
  - type: OpenAPI
    url: openapi/call402-com-pricing-api-openapi.yml
- aid: call402-com:call402-com-qr-code-api
  name: x402 Agent Services Qr Code API
  description: The Qr Code API from x402 Agent Services — 1 operation(s) for qr code.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - QR Codes
  tags_raw:
  - Qr Code
  properties:
  - type: OpenAPI
    url: openapi/call402-com-qr-code-api-openapi.yml
- aid: call402-com:call402-com-sec-company-facts-api
  name: x402 Agent Services Sec Company Facts API
  description: The Sec Company Facts API from x402 Agent Services — 1 operation(s) for sec company facts.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Sec Company Facts
  properties:
  - type: OpenAPI
    url: openapi/call402-com-sec-company-facts-api-openapi.yml
- aid: call402-com:call402-com-ssl-check-api
  name: x402 Agent Services Ssl Check API
  description: The Ssl Check API from x402 Agent Services — 1 operation(s) for ssl check.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Ssl Check
  properties:
  - type: OpenAPI
    url: openapi/call402-com-ssl-check-api-openapi.yml
- aid: call402-com:call402-com-stats-api
  name: x402 Agent Services Stats API
  description: The Stats API from x402 Agent Services — 1 operation(s) for stats.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/call402-com-stats-api-openapi.yml
- aid: call402-com:call402-com-text-extract-api
  name: x402 Agent Services Text Extract API
  description: The Text Extract API from x402 Agent Services — 1 operation(s) for text extract.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Text Extract
  properties:
  - type: OpenAPI
    url: openapi/call402-com-text-extract-api-openapi.yml
- aid: call402-com:call402-com-text-to-structure-api
  name: x402 Agent Services Text To Structure API
  description: The Text To Structure API from x402 Agent Services — 1 operation(s) for text to structure.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Text To Structure
  properties:
  - type: OpenAPI
    url: openapi/call402-com-text-to-structure-api-openapi.yml
- aid: call402-com:call402-com-timestamp-convert-api
  name: x402 Agent Services Timestamp Convert API
  description: The Timestamp Convert API from x402 Agent Services — 1 operation(s) for timestamp convert.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Timestamp Convert
  properties:
  - type: OpenAPI
    url: openapi/call402-com-timestamp-convert-api-openapi.yml
- aid: call402-com:call402-com-wallet-lookup-api
  name: x402 Agent Services Wallet Lookup API
  description: The Wallet Lookup API from x402 Agent Services — 1 operation(s) for wallet lookup.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - Wallet Lookup
  properties:
  - type: OpenAPI
    url: openapi/call402-com-wallet-lookup-api-openapi.yml
- aid: call402-com:call402-com-x402-integration-pack-api
  name: x402 Agent Services X402 Integration Pack API
  description: The X402 Integration Pack API from x402 Agent Services — 1 operation(s) for x402 integration pack.
  humanURL: https://call402.com/pricing
  baseURL: https://call402.com
  tags:
  - X402 Integration Pack
  properties:
  - type: OpenAPI
    url: openapi/call402-com-x402-integration-pack-api-openapi.yml
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

x402 Agent Services API — frequently asked questions

Does x402 Agent Services have an API?

Yes. APIs.io lists 21 APIs from x402 Agent Services, including x402 Agent Services Agent Jobs API, x402 Agent Services Dex Quote API and x402 Agent Services Domain Lookup API, and 18 more.

Is there an OpenAPI specification for the x402 Agent Services API?

Yes. APIs.io indexes 21 OpenAPI specifications for x402 Agent Services, each linked for download from this page.

How much does the x402 Agent Services API cost?

x402 Agent Services publishes its prices; its Standard plan is $0.002 as of 2026-11-03. APIs.io lists 1 pricing plan for x402 Agent Services, with each plan's price, limits and inclusions under Pricing on this page.

Is the x402 Agent Services API ready for AI agents?

x402 Agent Services has a Kin Score of 24.2 out of 100 (emerging) and an Agent Readiness score of 21.9 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/call402-com"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/call402-com/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/call402-com/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.