caption-sh

caption.sh provides an AI-powered captions API for automated user‑generated content pipelines. Developers can submit video and receive word‑level timestamps and subtitles, enabling captioned TikTok, Reels, Shorts and other short‑form videos. The service offers async job processing at $0.10 per minute, with a focus on developer‑first experience and robust webhook support for video processing workflows.

caption-sh publishes 11 API contracts indexed on the APIs.io network, including Antigravity.md API, Chatgpt.md API, Claude.md API, and 8 more. Tagged areas include Company, AI, Video, Captions, and API.

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

caption-sh’s developer surface includes engineering blog, authentication, documentation, FAQ, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

39.0/100 thin Agent 33/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 Agent Skills

CompanyAIVideo CaptionsAPIAutomation

Kin Score

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

Composite quality — 39.0/100 · thin

Contract Quality 10.1 / 21

Developer Ergonomics 5.1 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 8.1 / 10

Discoverability 5.3 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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/.

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/caption-sh/"><img src="https://apis.io/badge/caption-sh/card.svg" alt="caption-sh 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):

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)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 21.1 — up to +15.8 composite points
Developer Ergonomics scores 30.2 — up to +14.0 composite points
Contract Quality scores 47.5 — up to +13.1 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/caption-sh/apis.yml: open an issue on github.com/api-evangelist/caption-sh 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 11

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

caption-sh Antigravity.md API

The Antigravity.md API from caption-sh — 1 operation(s) for antigravity.md.

caption-sh Chatgpt.md API

The Chatgpt.md API from caption-sh — 1 operation(s) for chatgpt.md.

caption-sh Claude.md API

The Claude.md API from caption-sh — 1 operation(s) for claude.md.

caption-sh Codex.md API

The Codex.md API from caption-sh — 1 operation(s) for codex.md.

caption-sh Cursor.md API

The Cursor.md API from caption-sh — 1 operation(s) for cursor.md.

caption-sh Index.md API

The Index.md API from caption-sh — 1 operation(s) for index.md.

caption-sh Install.sh API

The Install.sh API from caption-sh — 1 operation(s) for install.sh.

caption-sh MCP API

The Mcp API from caption-sh — 2 operation(s) for mcp.

caption-sh Pricing.md API

The Pricing.md API from caption-sh — 1 operation(s) for pricing.md.

caption-sh Use Lazyweb.md API

The Use Lazyweb.md API from caption-sh — 1 operation(s) for use lazyweb.md.

caption-sh .well Known API

The .well Known API from caption-sh — 2 operation(s) for .well known.

Scroll for all 11

Agent Skills 1

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

caption-sh-create-mcp-token-and-call

AGENT SKILL

Semantic Vocabularies 1

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

Caption Sh Context

3 classes · 22 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

caption-sh API Rules

8 rules · 6 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

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

McpInstallTokenResponse

14 properties

JSON SCHEMA

Security Posture 2

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

Caption Sh Authentication

http · 1 scheme

SECURITY

Caption Sh Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Caption Sh Agentic Access

13 operations · 2 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCP

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

FAQ

FAQ

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: caption-sh
name: caption-sh
description: caption.sh provides an AI-powered captions API for automated user‑generated content pipelines. Developers can
  submit video and receive word‑level timestamps and subtitles, enabling captioned TikTok, Reels, Shorts and other short‑form
  videos. The service offers async job processing at $0.10 per minute, with a focus on developer‑first experience and robust
  webhook support for video processing workflows.
url: https://artifacts.apis.io/caption-sh/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- AI
- Video
- Captions
- API
- Automation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/caption-sh-agentic-access.yml
- type: Spectral
  url: rules/caption-sh-rules.yml
- type: JSONLD
  url: json-ld/caption-sh-context.jsonld
- type: Vocabulary
  url: vocabulary/caption-sh-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/caption-sh-data-model.yml
- type: ErrorCatalog
  url: errors/caption-sh-problem-types.yml
- type: Conformance
  url: conformance/caption-sh-conformance.yml
- type: LLMsTxt
  url: llms/caption-sh-llms.txt
- type: Hosts
  url: hosts/caption-sh-hosts.yml
- type: Vendors
  url: vendors/caption-sh-vendors.yml
- type: Blog
  url: https://caption.sh/blog
- type: Authentication
  url: authentication/caption-sh-authentication.yml
- type: DomainSecurity
  url: security/caption-sh-domain-security.yml
- type: Website
  url: https://caption.sh/
- type: Documentation
  url: https://caption.sh/index.md
- type: TermsOfService
  url: https://caption.sh/terms
- type: PrivacyPolicy
  url: https://caption.sh/privacy
- type: FAQ
  url: https://caption.sh/#faq
- type: MCP
  url: https://caption.sh/#mcp
apis:
- aid: caption-sh:caption-sh-antigravity-md-api
  name: caption-sh Antigravity.md API
  description: The Antigravity.md API from caption-sh — 1 operation(s) for antigravity.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Antigravity.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-antigravity-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-chatgpt-md-api
  name: caption-sh Chatgpt.md API
  description: The Chatgpt.md API from caption-sh — 1 operation(s) for chatgpt.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Chatgpt.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-chatgpt-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-claude-md-api
  name: caption-sh Claude.md API
  description: The Claude.md API from caption-sh — 1 operation(s) for claude.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Claude.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-claude-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-codex-md-api
  name: caption-sh Codex.md API
  description: The Codex.md API from caption-sh — 1 operation(s) for codex.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Codex.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-codex-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-cursor-md-api
  name: caption-sh Cursor.md API
  description: The Cursor.md API from caption-sh — 1 operation(s) for cursor.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Cursor.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-cursor-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-index-md-api
  name: caption-sh Index.md API
  description: The Index.md API from caption-sh — 1 operation(s) for index.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Index.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-index-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-install-sh-api
  name: caption-sh Install.sh API
  description: The Install.sh API from caption-sh — 1 operation(s) for install.sh.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Install.sh
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-install-sh-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-mcp-api
  name: caption-sh MCP API
  description: The Mcp API from caption-sh — 2 operation(s) for mcp.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-mcp-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-pricing-md-api
  name: caption-sh Pricing.md API
  description: The Pricing.md API from caption-sh — 1 operation(s) for pricing.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Pricing.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-pricing-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-use-lazyweb-md-api
  name: caption-sh Use Lazyweb.md API
  description: The Use Lazyweb.md API from caption-sh — 1 operation(s) for use lazyweb.md.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - Use Lazyweb.md
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-use-lazyweb-md-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
- aid: caption-sh:caption-sh-well-known-api
  name: caption-sh .well Known API
  description: The .well Known API from caption-sh — 2 operation(s) for .well known.
  humanURL: https://caption.sh
  baseURL: https://www.lazyweb.com
  tags:
  - .well Known
  properties:
  - type: OpenAPI
    url: openapi/caption-sh-well-known-api-openapi.yml
  - type: JSONSchema
    url: json-schema/caption-sh-mcp-install-token-response-schema.json
x-enrichment:
  date: '2026-10-30'
  status: nochange
  artifacts_added: 0
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

caption-sh API — frequently asked questions

Does caption-sh have an API?

Yes. APIs.io lists 11 APIs from caption-sh, including caption-sh Antigravity.md API, caption-sh Chatgpt.md API and caption-sh Claude.md API, and 8 more.

Is there an OpenAPI specification for the caption-sh API?

Yes. APIs.io indexes 11 OpenAPI specifications for caption-sh, each linked for download from this page.

How do I authenticate with the caption-sh API?

caption-sh uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Caption Sh Authentication.

Is the caption-sh API ready for AI agents?

caption-sh has a Kin Score of 39.0 out of 100 (thin) and an Agent Readiness score of 33.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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/caption-sh"

All providers

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

Every operation they expose

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

How their score was established

curl "https://apis.io/api/v1/providers/caption-sh/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

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.