LLMWhisperer

LLMWhisperer is a document-to-text extraction API from Unstract (Zipstack) that turns complex PDFs, scanned documents, and images into clean, layout-preserving text ready for large language models. It exposes an asynchronous REST API (v2) - submit a document to /whisper, poll /whisper-status, then retrieve the extracted text via /whisper-retrieve - plus line-level highlight coordinates and webhook callbacks. Authentication is via the unstract-key header.

LLMWhisperer publishes 5 APIs on the APIs.io network, including Extraction API, Highlights API, Retrieve API, and 2 more. Tagged areas include AI, LLM, Document Extraction, OCR, and Text Extraction.

LLMWhisperer’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.7/100 thin ▬ flat Agent 38/100 agent ready Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1

AccessFreemiumOpen⚡ Free to try

5 APIs

AILLMDocument ExtractionOCRText Extraction

Kin Score

Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1

Composite quality — 39.7/100 · thin

Contract Quality 15.3 / 25

Developer Ergonomics 4.3 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/llmwhisperer: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

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

Rate Limits 1

Documented rate limits and quota policies.

Llmwhisperer Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: llmwhisperer
url: https://raw.githubusercontent.com/api-evangelist/llmwhisperer/refs/heads/main/apis.yml
name: LLMWhisperer
kind: company
description: LLMWhisperer is a document-to-text extraction API from Unstract (Zipstack) that turns complex PDFs, scanned documents,
  and images into clean, layout-preserving text ready for large language models. It exposes an asynchronous REST API (v2)
  - submit a document to /whisper, poll /whisper-status, then retrieve the extracted text via /whisper-retrieve - plus line-level
  highlight coordinates and webhook callbacks. Authentication is via the unstract-key header.
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/llmwhisperer.png
tags:
- AI
- LLM
- Document Extraction
- OCR
- Text Extraction
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
apis:
- aid: llmwhisperer:llmwhisperer-extraction-api
  name: LLMWhisperer Extraction API
  description: The Extraction API from LLMWhisperer — 1 operation(s) for extraction.
  humanURL: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  baseURL: https://llmwhisperer-api.us-central.unstract.com/api/v2
  tags:
  - Extraction
  properties:
  - type: OpenAPI
    url: openapi/llmwhisperer-extraction-api-openapi.yml
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  - type: APIReference
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_apis_intro/
  - type: PostmanCollection
    url: collections/llmwhisperer.postman_collection.json
  - type: OpenCollection
    url: collections/llmwhisperer.opencollection.json
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_status_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_retrieve_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_highlighting_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_webhooks_manage/
  - type: Review
    url: review.yml
- aid: llmwhisperer:llmwhisperer-highlights-api
  name: LLMWhisperer Highlights API
  description: The Highlights API from LLMWhisperer — 1 operation(s) for highlights.
  humanURL: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  baseURL: https://llmwhisperer-api.us-central.unstract.com/api/v2
  tags:
  - Highlights
  properties:
  - type: OpenAPI
    url: openapi/llmwhisperer-highlights-api-openapi.yml
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  - type: APIReference
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_apis_intro/
  - type: PostmanCollection
    url: collections/llmwhisperer.postman_collection.json
  - type: OpenCollection
    url: collections/llmwhisperer.opencollection.json
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_status_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_retrieve_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_highlighting_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_webhooks_manage/
  - type: Review
    url: review.yml
- aid: llmwhisperer:llmwhisperer-retrieve-api
  name: LLMWhisperer Retrieve API
  description: The Retrieve API from LLMWhisperer — 1 operation(s) for retrieve.
  humanURL: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  baseURL: https://llmwhisperer-api.us-central.unstract.com/api/v2
  tags:
  - Retrieve
  properties:
  - type: OpenAPI
    url: openapi/llmwhisperer-retrieve-api-openapi.yml
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  - type: APIReference
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_apis_intro/
  - type: PostmanCollection
    url: collections/llmwhisperer.postman_collection.json
  - type: OpenCollection
    url: collections/llmwhisperer.opencollection.json
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_status_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_retrieve_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_highlighting_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_webhooks_manage/
  - type: Review
    url: review.yml
- aid: llmwhisperer:llmwhisperer-status-api
  name: LLMWhisperer Status API
  description: The Status API from LLMWhisperer — 1 operation(s) for status.
  humanURL: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  baseURL: https://llmwhisperer-api.us-central.unstract.com/api/v2
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/llmwhisperer-status-api-openapi.yml
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  - type: APIReference
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_apis_intro/
  - type: PostmanCollection
    url: collections/llmwhisperer.postman_collection.json
  - type: OpenCollection
    url: collections/llmwhisperer.opencollection.json
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_status_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_retrieve_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_highlighting_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_webhooks_manage/
  - type: Review
    url: review.yml
- aid: llmwhisperer:llmwhisperer-webhooks-api
  name: LLMWhisperer Webhooks API
  description: The Webhooks API from LLMWhisperer — 1 operation(s) for webhooks.
  humanURL: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  baseURL: https://llmwhisperer-api.us-central.unstract.com/api/v2
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/llmwhisperer-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_api/
  - type: APIReference
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_apis_intro/
  - type: PostmanCollection
    url: collections/llmwhisperer.postman_collection.json
  - type: OpenCollection
    url: collections/llmwhisperer.opencollection.json
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_status_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_text_extraction_retrieve_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_highlighting_api/
  - type: Documentation
    url: https://docs.unstract.com/llmwhisperer/llm_whisperer/apis/llm_whisperer_webhooks_manage/
  - type: Review
    url: review.yml
common:
- type: AgenticAccess
  url: agentic-access/llmwhisperer-agentic-access.yml
- type: DomainSecurity
  url: security/llmwhisperer-domain-security.yml
- type: Authentication
  url: authentication/llmwhisperer-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Zipstack
- type: LinkedIn
  url: https://www.linkedin.com/company/unstract
- type: Website
  url: https://unstract.com/llmwhisperer/
- type: Documentation
  url: https://docs.unstract.com/llmwhisperer/
- type: Plans
  url: plans/llmwhisperer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/llmwhisperer-rate-limits.yml
- type: FinOps
  url: finops/llmwhisperer-finops.yml
- url: https://unstract.com/feed/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

LLMWhisperer

Kin Score

APIs 5

LLMWhisperer Extraction API

LLMWhisperer Highlights API

LLMWhisperer Retrieve API

LLMWhisperer Status API

LLMWhisperer Webhooks API

Open Collections 1

LLMWhisperer API

Pricing Plans 1

Llmwhisperer Plans Pricing

Rate Limits 1

Llmwhisperer Rate Limits

FinOps 1

Llmwhisperer Finops

Security Posture 2

Llmwhisperer Authentication

Llmwhisperer Domain Security

Agentic Access 1

Llmwhisperer Agentic Access

Resources