MediaCaption API

A credit-billed REST API for retrieving public YouTube transcripts, with single and bulk transcript jobs, job-level webhooks, and AI transcription/translation capabilities. Backed by a public OpenAPI 3.1 contract with bearer/X-API-Key authentication.

MediaCaption API publishes 7 API contracts indexed on the APIs.io network, including Balance API, Jobs API, Transcriptions API, and 4 more. Tagged areas include YouTube, Transcription, Captions, Subtitles, and Video.

The MediaCaption API catalog on APIs.io includes 1 event-driven AsyncAPI specification.

MediaCaption API’s developer surface includes authentication, changelog, pricing, support, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.8/100 developing ▬ flat Agent 44/100 agent ready Front door AI 4/6 moderate Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

2 published contracts 1 MCP Servers

YouTube Transcription Captions Subtitles Video REST OpenAPI Webhook Speech-to-Text Media Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 51.8/100 · developing

Contract Quality 10.9 / 19

Developer Ergonomics 7.1 / 15

Access Clarity 7.9 / 15

Operational Transparency 5.4 / 10

Contract Governance 0.4 / 9

Discoverability 4.6 / 8

Regulatory Posture 3.7 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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 github.com/api-evangelist/mediacaption-api: open an issue to ask a question, or submit a pull request to add artifacts. 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.

OpenAPI

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

REST

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 7

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

MediaCaption API Balance API

Authenticated account credit balance endpoints.

MediaCaption API Jobs API

Async job status and item result endpoints.

MediaCaption API Transcriptions API

Retained transcript lookup endpoints.

MediaCaption API Transcripts API

Synchronous and async public YouTube transcript endpoints.

MediaCaption API Uploads API

Multipart media upload and AI transcription endpoints.

MediaCaption API User API

Authenticated account endpoints.

MediaCaption API Webhooks API

Job-level webhook event contracts.

Scroll for all 7

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

MediaCaption API MCP Server

Media Caption ships no MCP server — no hosted endpoint, no stdio package, no MCP mention anywhere in the docs, and a web search finds only unaffiliated third-party YouTube-capti...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Mediacaption Api Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mediacaption Api Rate Limits

4 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Mediacaption Api Webhooks

ASYNCAPI

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Mediacaption Api Openapi Overlay

5 actions · update · mediacaption-api-openapi.yaml

GENERATED

Security Posture 2

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

Mediacaption Api Authentication

apiKey/http · 2 schemes

SECURITY

Mediacaption Api Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

RateLimits

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

name: MediaCaption API
description: A credit-billed REST API for retrieving public YouTube transcripts, with single and bulk transcript jobs, job-level
  webhooks, and AI transcription/translation capabilities. Backed by a public OpenAPI 3.1 contract with bearer/X-API-Key authentication.
url: https://raw.githubusercontent.com/api-evangelist/mediacaption-api/refs/heads/main/apis.yml
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
created: '2026-07-18'
modified: '2026-09-03'
image: https://www.mediacaption.io/android-chrome-512x512.png
specificationVersion: '0.23'
tags:
- YouTube
- Transcription
- Captions
- Subtitles
- Video
- REST
- OpenAPI
- Webhook
- Speech-to-Text
- Media
- Developer Tools
tags_raw:
- youtube
- transcription
- captions
- subtitles
- video
- rest
- openapi
- webhooks
- speech-to-text
- media
- developer-tools
apis:
- aid: mediacaption-api:mediacaption-api-balance-api
  name: MediaCaption API Balance API
  description: Authenticated account credit balance endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-balance-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-jobs-api
  name: MediaCaption API Jobs API
  description: Async job status and item result endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-jobs-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-transcriptions-api
  name: MediaCaption API Transcriptions API
  description: Retained transcript lookup endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Transcriptions
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-transcriptions-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-transcripts-api
  name: MediaCaption API Transcripts API
  description: Synchronous and async public YouTube transcript endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Transcripts
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-transcripts-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-uploads-api
  name: MediaCaption API Uploads API
  description: Multipart media upload and AI transcription endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Uploads
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-uploads-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-user-api
  name: MediaCaption API User API
  description: Authenticated account endpoints.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - User
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-user-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
- aid: mediacaption-api:mediacaption-api-webhooks-api
  name: MediaCaption API Webhooks API
  description: Job-level webhook event contracts.
  humanURL: https://www.mediacaption.io/api
  baseURL: https://api.mediacaption.io/v1
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/mediacaption-api-webhooks-api-openapi.yml
  - type: Documentation
    url: https://www.mediacaption.io/docs
  - type: GettingStarted
    url: https://www.mediacaption.io/docs/quickstart
  - type: APIReference
    url: https://www.mediacaption.io/docs/api-reference/transcripts
maintainers:
- FN: MediaCaption API
  url: https://www.mediacaption.io
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 95
  at: '2026-07-18T18:19:45.114Z'
common:
- type: Overlay
  url: overlays/mediacaption-api-openapi-overlay.yaml
- type: Website
  url: https://mediacaption.io
- type: DomainSecurity
  url: security/mediacaption-api-domain-security.yml
- type: Authentication
  url: authentication/mediacaption-api-authentication.yml
- type: WellKnown
  url: well-known/mediacaption-api-well-known.yml
- type: Webhooks
  url: asyncapi/mediacaption-api-webhooks.yml
- type: MCPServer
  url: mcp/mediacaption-api-mcp.yml
- type: LLMsTxt
  url: llms/mediacaption-api-llms.txt
- type: Conformance
  url: conformance/mediacaption-api-conformance.yml
- type: ErrorCatalog
  url: errors/mediacaption-api-problem-types.yml
- type: Lifecycle
  url: lifecycle/mediacaption-api-lifecycle.yml
- type: ChangeLog
  url: changelog/mediacaption-api-changelog.yml
- type: ChangeLog
  url: https://www.mediacaption.io/docs/changelog
- type: Conventions
  url: conventions/mediacaption-api-conventions.yml
- type: DataModel
  url: data-model/mediacaption-api-data-model.yml
- type: Plans
  url: plans/mediacaption-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/mediacaption-api-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Pricing
  url: https://www.mediacaption.io/pricing
- type: Support
  url: https://www.mediacaption.io/report
- type: TermsOfService
  url: https://www.mediacaption.io/terms
- type: PrivacyPolicy
  url: https://www.mediacaption.io/privacy
x-enrichment:
  date: '2026-09-03'
  status: enriched
  artifacts_added: 22
  pass: local-v2

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