thirds.ai

Turn one design into content at scale. thirds.ai makes editable templates from a text prompt, HTML, a picture, or gallery and renders PDFs and images via a web app, REST API, or hosted MCP server. Outputs are PDF, PNG, JPEG, and WebP.

thirds.ai publishes 17 API contracts indexed on the APIs.io network, including Batches API, Brand Kits API, Carousels API, and 14 more. Tagged areas include pdf-automation, image-automation, Document Generation, HTML to PDF, and HTML to Image.

The thirds.ai catalog on APIs.io includes 1 event-driven AsyncAPI specification.

thirds.ai’s developer surface includes authentication, documentation, pricing, support, engineering blog, changelog, sandbox, and 20 more developer resources.

56.4/100 strong ▬ flat Agent 42/100 agent native Front door AI 6/6 dominant Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
2 published contracts 1 MCP Servers
pdf-automationimage-automationDocument GenerationHTML to PDFHTML to Imagetemplate-renderingBranded ContentDeveloper ToolsMCP ServerAgent-Nativemarketing-ops

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Developer Platform & API Ecosystem Management
BC-4270
KeysWebhooks
POST /v1/keys DELETE /v1/keys/{key_id} GET /v1/webhooks/{webhook_id}/deliveries POST /v1/webhooks

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
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/thirds-ai: 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 →

APIs 17

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

thirds.ai MCP Server

Hosted MCP server exposing thirds.ai tools (create_brand_kit, create_template, edit_template, publish_template, render, create_batch, get_status, and more) over Streamable HTTP ...

thirds.ai Batches API

The Batches API from thirds.ai — 5 operation(s) for batches.

thirds.ai Brand Kits API

The Brand Kits API from thirds.ai — 4 operation(s) for brand kits.

thirds.ai Carousels API

The Carousels API from thirds.ai — 4 operation(s) for carousels.

thirds.ai Downloads API

The Downloads API from thirds.ai — 1 operation(s) for downloads.

thirds.ai Image API

The Image API from thirds.ai — 2 operation(s) for image.

thirds.ai Image Assets API

The Image Assets API from thirds.ai — 3 operation(s) for image assets.

thirds.ai Image Packs API

The Image Packs API from thirds.ai — 4 operation(s) for image packs.

thirds.ai Keys API

The Keys API from thirds.ai — 2 operation(s) for keys.

thirds.ai Me API

The Me API from thirds.ai — 1 operation(s) for me.

thirds.ai Openapi.json API

The Openapi.json API from thirds.ai — 1 operation(s) for openapi.json.

thirds.ai PDF API

The Pdf API from thirds.ai — 2 operation(s) for pdf.

thirds.ai Public Stats API

The Public Stats API from thirds.ai — 1 operation(s) for public stats.

thirds.ai Template Builds API

The Template Builds API from thirds.ai — 7 operation(s) for template builds.

thirds.ai Templates API

The Templates API from thirds.ai — 6 operation(s) for templates.

thirds.ai Testimonials API

The Testimonials API from thirds.ai — 1 operation(s) for testimonials.

thirds.ai Webhooks API

The Webhooks API from thirds.ai — 8 operation(s) for webhooks.

Scroll for all 17

MCP Servers 1

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

thirds.ai MCP Server

Official hosted MCP server exposing thirds.ai PDF/image rendering, template, brand-kit and batch tools over Streamable HTTP with bearer-token auth. Uses the caller's existing ac...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Thirds Ai Rate Limits

5 limits

RATE LIMITS

Event Specifications 1

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

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.

Thirds Ai Openapi Overlay

3 actions · update · thirds-ai-openapi.yml

GENERATED

Security Posture 3

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

Thirds Ai Authentication

apiKey/http · 2 schemes

SECURITY

Thirds Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Thirds Ai Vulnerability Disclosure

contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Scroll for all 7

Access & Security 4

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
name: thirds.ai
description: Turn one design into content at scale. thirds.ai makes editable templates from a text prompt, HTML, a picture,
  or gallery and renders PDFs and images via a web app, REST API, or hosted MCP server. Outputs are PDF, PNG, JPEG, and WebP.
url: https://raw.githubusercontent.com/api-evangelist/thirds-ai/refs/heads/main/apis.yml
created: '2026-09-18'
modified: '2026-10-06'
specificationVersion: '0.21'
tags:
- pdf-automation
- image-automation
- Document Generation
- HTML to PDF
- HTML to Image
- template-rendering
- Branded Content
- Developer Tools
- MCP Server
- Agent-Native
- marketing-ops
tags_raw:
- pdf-automation
- image-automation
- document-generation
- html-to-pdf
- html-to-image
- template-rendering
- branded-content
- developer-tools
- mcp-server
- agent-native
- marketing-ops
apis:
- name: thirds.ai MCP Server
  description: Hosted MCP server exposing thirds.ai tools (create_brand_kit, create_template, edit_template, publish_template,
    render, create_batch, get_status, and more) over Streamable HTTP with bearer-token auth. Uses your existing account, credits,
    and templates.
  humanURL: https://thirds.ai/docs/mcp
  baseURL: https://thirds.ai/mcp
  tags:
  - pdf-automation
  - image-automation
  - Document Generation
  - HTML to PDF
  - HTML to Image
  - template-rendering
  - Branded Content
  - Developer Tools
  - MCP Server
  - Agent-Native
  - marketing-ops
  tags_raw:
  - pdf-automation
  - image-automation
  - document-generation
  - html-to-pdf
  - html-to-image
  - template-rendering
  - branded-content
  - developer-tools
  - mcp-server
  - agent-native
  - marketing-ops
  properties:
  - type: MCPServer
    url: mcp/thirds-ai-mcp.yml
  - type: MCPServer
    url: https://thirds.ai/mcp
  - type: Documentation
    url: https://thirds.ai/docs/mcp
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: ToolCrosswalk
    url: mcp/thirds-ai-tool-crosswalk.yml
- aid: thirds-ai:thirds-ai-batches-api
  name: thirds.ai Batches API
  description: The Batches API from thirds.ai — 5 operation(s) for batches.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Batches
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-batches-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-brand-kits-api
  name: thirds.ai Brand Kits API
  description: The Brand Kits API from thirds.ai — 4 operation(s) for brand kits.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Brand Kits
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-brand-kits-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-carousels-api
  name: thirds.ai Carousels API
  description: The Carousels API from thirds.ai — 4 operation(s) for carousels.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Carousels
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-carousels-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-downloads-api
  name: thirds.ai Downloads API
  description: The Downloads API from thirds.ai — 1 operation(s) for downloads.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Downloads
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-downloads-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-image-api
  name: thirds.ai Image API
  description: The Image API from thirds.ai — 2 operation(s) for image.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Image
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-image-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-image-assets-api
  name: thirds.ai Image Assets API
  description: The Image Assets API from thirds.ai — 3 operation(s) for image assets.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Image Assets
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-image-assets-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-image-packs-api
  name: thirds.ai Image Packs API
  description: The Image Packs API from thirds.ai — 4 operation(s) for image packs.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Image Packs
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-image-packs-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-keys-api
  name: thirds.ai Keys API
  description: The Keys API from thirds.ai — 2 operation(s) for keys.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-keys-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-me-api
  name: thirds.ai Me API
  description: The Me API from thirds.ai — 1 operation(s) for me.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Me
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-me-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-openapi-json-api
  name: thirds.ai Openapi.json API
  description: The Openapi.json API from thirds.ai — 1 operation(s) for openapi.json.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Openapi.json
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-openapi-json-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-pdf-api
  name: thirds.ai PDF API
  description: The Pdf API from thirds.ai — 2 operation(s) for pdf.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - PDF
  tags_raw:
  - Pdf
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-pdf-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-public-stats-api
  name: thirds.ai Public Stats API
  description: The Public Stats API from thirds.ai — 1 operation(s) for public stats.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Public Stats
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-public-stats-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-template-builds-api
  name: thirds.ai Template Builds API
  description: The Template Builds API from thirds.ai — 7 operation(s) for template builds.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Template Builds
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-template-builds-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-templates-api
  name: thirds.ai Templates API
  description: The Templates API from thirds.ai — 6 operation(s) for templates.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-templates-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-testimonials-api
  name: thirds.ai Testimonials API
  description: The Testimonials API from thirds.ai — 1 operation(s) for testimonials.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Testimonials
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-testimonials-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
- aid: thirds-ai:thirds-ai-webhooks-api
  name: thirds.ai Webhooks API
  description: The Webhooks API from thirds.ai — 8 operation(s) for webhooks.
  humanURL: https://thirds.ai/docs/api-reference
  baseURL: https://thirds.ai/v1
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/thirds-ai-webhooks-api-openapi.yml
  - type: Documentation
    url: https://thirds.ai/docs
  - type: LLMsTxt
    url: https://thirds.ai/llms.txt
  - type: APIReference
    url: https://thirds.ai/docs/api-reference
  - type: GettingStarted
    url: https://thirds.ai/docs/quickstart
maintainers:
- FN: thirds.ai
  url: https://thirds.ai
  email: support@thirds.ai
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 96
  at: '2026-09-18T09:14:04.214Z'
common:
- url: https://thirds.ai/blog/feed.xml
  type: BlogRSS
- type: CapabilityMap
  url: capabilities/thirds-ai-capability-edges.yml
  name: thirds.ai Business Capability Map
- type: Overlay
  url: overlays/thirds-ai-openapi-overlay.yaml
- type: DomainSecurity
  url: security/thirds-ai-domain-security.yml
- type: Authentication
  url: authentication/thirds-ai-authentication.yml
- type: Website
  url: https://thirds.ai
- type: Documentation
  url: https://thirds.ai/docs
- type: Pricing
  url: https://thirds.ai/pricing
- type: Support
  url: https://thirds.ai/support
- type: Blog
  url: https://thirds.ai/blog
- type: TermsOfService
  url: https://thirds.ai/terms
- type: PrivacyPolicy
  url: https://thirds.ai/privacy
- type: ChangeLog
  url: https://thirds.ai/changelog
- type: LLMsTxt
  url: llms/thirds-ai-llms.txt
- type: Conventions
  url: conventions/thirds-ai-conventions.yml
- type: Idempotency
  url: conventions/thirds-ai-conventions.yml
- type: Conformance
  url: conformance/thirds-ai-conformance.yml
- type: Lifecycle
  url: lifecycle/thirds-ai-lifecycle.yml
- type: Plans
  url: plans/thirds-ai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/thirds-ai-rate-limits.yml
- type: Sandbox
  url: sandbox/thirds-ai-sandbox.yml
- type: ErrorCatalog
  url: errors/thirds-ai-problem-types.yml
- type: DataModel
  url: data-model/thirds-ai-data-model.yml
- type: Webhooks
  url: asyncapi/thirds-ai-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: VulnerabilityDisclosure
  url: security/thirds-ai-vulnerability-disclosure.yml
- type: Security
  url: security/thirds-ai-vulnerability-disclosure.yml
x-enrichment:
  date: '2026-09-18'
  status: enriched
  artifacts_added: 22
  pass: local-v3

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/thirds-ai"
All providers
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose
curl "https://apis.io/api/v1/providers/thirds-ai/operations?limit=25"
How their score was established
curl "https://apis.io/api/v1/providers/thirds-ai/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.

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