Coinslot

Coinslot provides micro‑APIs that AI agents can pay for autonomously via x402 (USDC). No signup is required – insert a coin and get a result. The platform offers 12 micro‑APIs, each callable by AI or humans with credits, built and operated by an AI. It aims to be the vending machine for machines, exposing simple, pay‑per‑call endpoints for tasks like currency conversion, weather, and more.

Coinslot is listed with 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, Micro-API, Payments, Automation, and Machine Learning.

The Coinslot catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

🌐 Visit website📡 Profile data on GitHub
11.5/100 emerging Agent 20/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessOpen
1 API
Artificial IntelligenceMicro-APIPaymentsAutomationMachine Learning

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Composite quality — 11.5/100 · emerging
Contract Quality 4.3 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 2.2 / 10
Discoverability 4.6 / 9
Regulatory Posture 1.4 / 15
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 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 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/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • 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)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • 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)
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
10 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/coinslot-dev/apis.yml: open an issue on github.com/api-evangelist/coinslot-dev 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.

Model Context Protocol (MCP)
measured — observed by APIs.io (documented)

APIs 1

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

Coinslot API

Coinslot API as documented publicly: 15 operations. Contract generated from the documentation by API Evangelist (2026-11-04); not the provider's own document.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Coinslot Dev Context

4 classes · 6 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Coinslot API Rules

41 rules · 39 errors 1 warnings 1 info

SPECTRAL

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

GetApiDiffResponse

2 properties

JSON SCHEMA

PostApiCheckoutRequest

1 properties

JSON SCHEMA

PostApiDiffRequest

2 properties

JSON SCHEMA

PostApiQrRequest

1 properties

JSON SCHEMA

Security Posture 1

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

Coinslot Dev Domain Security

TLSv1.3

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 Conformance
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)

apis.yml Raw ↑ 
aid: coinslot-dev
name: Coinslot
description: Coinslot provides micro‑APIs that AI agents can pay for autonomously via x402 (USDC). No signup is required –
  insert a coin and get a result. The platform offers 12 micro‑APIs, each callable by AI or humans with credits, built and
  operated by an AI. It aims to be the vending machine for machines, exposing simple, pay‑per‑call endpoints for tasks like
  currency conversion, weather, and more.
url: https://artifacts.apis.io/coinslot-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Artificial Intelligence
- Micro-API
- Payments
- Automation
- Machine Learning
tags_raw:
- AI
- Micro-API
- Payments
- Automation
- Machine Learning
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/coinslot-dev-rules.yml
- type: JSONLD
  url: json-ld/coinslot-dev-context.jsonld
- type: Vocabulary
  url: vocabulary/coinslot-dev-vocabulary.yml
- type: DataModel
  url: data-model/coinslot-dev-data-model.yml
- type: Conformance
  url: conformance/coinslot-dev-conformance.yml
- type: LLMsTxt
  url: llms/coinslot-dev-llms.txt
- type: Hosts
  url: hosts/coinslot-dev-hosts.yml
- type: Vendors
  url: vendors/coinslot-dev-vendors.yml
- type: DomainSecurity
  url: security/coinslot-dev-domain-security.yml
- type: Website
  url: https://coinslot.dev/
apis:
- aid: coinslot-dev:coinslot-dev-api
  name: Coinslot API
  description: 'Coinslot API as documented publicly: 15 operations. Contract generated from the documentation by API Evangelist
    (2026-11-04);

    not the provider''s own document.'
  humanURL: https://coinslot.dev/docs.html
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/coinslot-dev-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/coinslot-dev-get-api-diff-response-schema.json
  - type: JSONSchema
    url: json-schema/coinslot-dev-post-api-diff-request-schema.json
  - type: JSONSchema
    url: json-schema/coinslot-dev-post-api-checkout-request-schema.json
  - type: JSONSchema
    url: json-schema/coinslot-dev-post-api-qr-request-schema.json
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Coinslot API — frequently asked questions

Does Coinslot have an API?

Yes. APIs.io lists 1 API from Coinslot, including Coinslot API.

Is there an OpenAPI specification for the Coinslot API?

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

How do I authenticate with the Coinslot API?

Coinslot uses bearer-token authentication.

Is the Coinslot API ready for AI agents?

Coinslot has a Kin Score of 11.5 out of 100 (emerging) and an Agent Readiness score of 20.3 (agent-aware), scored by API Evangelist on 2026-11-06.

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