Capmonster

CapMonster Cloud provides a fast CAPTCHA solving service powered by AI, supporting reCAPTCHA, GeeTest, Cloudflare and other challenges. It enables developers to scale automatic solving of simple and complex CAPTCHAs via an API, offering high accuracy and speed for integration into bots, scrapers, and automation tools. The platform includes a dashboard, detailed analytics, and flexible pricing plans for various usage levels.

Capmonster publishes 2 API contracts indexed on the APIs.io network: Account API and Tasks API. Tagged areas include Company, CAPTCHA, AI, Automation, and Cloud.

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

Capmonster’s developer surface includes documentation and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.2/100 thin Agent 31/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company CAPTCHAAIAutomation Cloud

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 28.2/100 · thin

Contract Quality 13.6 / 21

Developer Ergonomics 3.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 5 / 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

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):

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)
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)
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 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 18.5 — up to +16.3 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/capmonster/apis.yml: open an issue on github.com/api-evangelist/capmonster 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 →

APIs 2

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

Capmonster Account API

Account-level operations.

Capmonster Tasks API

Create captcha tasks and fetch their results.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

capmonster-create-and-fetch-task

AGENT SKILL

Semantic Vocabularies 1

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

Capmonster Context

23 classes · 37 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Capmonster API Rules

18 rules · 16 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

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

CreateTaskRequest

4 properties

JSON SCHEMA

CreateTaskResponse

4 properties

JSON SCHEMA

GetBalanceRequest

1 properties

JSON SCHEMA

GetBalanceResponse

4 properties

JSON SCHEMA

GetTaskResultRequest

2 properties

JSON SCHEMA

GetTaskResultResponse

6 properties

JSON SCHEMA

Security Posture 1

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

Capmonster Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Capmonster Agentic Access

3 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

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

Vendors

Vendors

Hosts

Hosts

Source (apis.yml)

aid: capmonster
name: Capmonster
image: https://capmonster.cloud/android-chrome-512x512.png
description: CapMonster Cloud provides a fast CAPTCHA solving service powered by AI, supporting reCAPTCHA, GeeTest, Cloudflare
  and other challenges. It enables developers to scale automatic solving of simple and complex CAPTCHAs via an API, offering
  high accuracy and speed for integration into bots, scrapers, and automation tools. The platform includes a dashboard, detailed
  analytics, and flexible pricing plans for various usage levels.
url: https://artifacts.apis.io/capmonster/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- CAPTCHA
- AI
- Automation
- Cloud
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Vendors
  url: vendors/capmonster-vendors.yml
- type: AgenticAccess
  url: agentic-access/capmonster-agentic-access.yml
- type: Spectral
  url: rules/capmonster-rules.yml
- type: JSONLD
  url: json-ld/capmonster-context.jsonld
- type: Vocabulary
  url: vocabulary/capmonster-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/capmonster-data-model.yml
- type: ErrorCatalog
  url: errors/capmonster-problem-types.yml
- type: Conformance
  url: conformance/capmonster-conformance.yml
- type: LLMsTxt
  url: llms/capmonster-llms.txt
- type: Hosts
  url: hosts/capmonster-hosts.yml
- type: SDKs
  url: packages/capmonster-packages.yml
- type: Packages
  url: packages/capmonster-packages.yml
- type: Documentation
  url: https://docs.capmonster.cloud/
- type: DomainSecurity
  url: security/capmonster-domain-security.yml
- type: Website
  url: https://capmonster.cloud/
apis:
- aid: capmonster:capmonster-account-api
  name: Capmonster Account API
  description: Account-level operations.
  humanURL: https://docs.capmonster.cloud/docs/category/api/
  baseURL: https://api.capmonster.cloud
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/capmonster-account-api-openapi.yml
  - type: JSONSchema
    url: json-schema/capmonster-get-task-result-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-create-task-request-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-create-task-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-task-result-request-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-balance-request-schema.json
- aid: capmonster:capmonster-tasks-api
  name: Capmonster Tasks API
  description: Create captcha tasks and fetch their results.
  humanURL: https://docs.capmonster.cloud/docs/category/api/
  baseURL: https://api.capmonster.cloud
  tags:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/capmonster-tasks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/capmonster-get-task-result-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-create-task-request-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-create-task-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-balance-response-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-task-result-request-schema.json
  - type: JSONSchema
    url: json-schema/capmonster-get-balance-request-schema.json
x-submission-probe: 200 https://capmonster.cloud/en/, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Capmonster API — frequently asked questions

Does Capmonster have an API?

Yes. APIs.io lists 2 APIs from Capmonster, including Capmonster Account API and Capmonster Tasks API.

Is there an OpenAPI specification for the Capmonster API?

Yes. APIs.io indexes 2 OpenAPI specifications for Capmonster, each linked for download from this page.

Is the Capmonster API ready for AI agents?

Capmonster has a Kin Score of 28.2 out of 100 (thin) and an Agent Readiness score of 31.0 (agent-ready), scored by API Evangelist on 2026-10-31.

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