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 Artificial Intelligence, 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

39.2/100 thin ▬ flat Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemiumOpen⚡ Free to try

1 APIs

Artificial Intelligence LLM Document Extraction OCR Text Extraction

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 39.2/100 · thin

Contract Quality 12.8 / 23

Developer Ergonomics 5.8 / 18

Access Clarity 7.1 / 18

Operational Transparency 4.0 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/llmwhisperer: 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 5

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

LLMWhisperer Extraction API

The Extraction API from LLMWhisperer — 1 operation(s) for extraction.

LLMWhisperer Highlights API

The Highlights API from LLMWhisperer — 1 operation(s) for highlights.

LLMWhisperer Retrieve API

The Retrieve API from LLMWhisperer — 1 operation(s) for retrieve.

LLMWhisperer Status API

The Status API from LLMWhisperer — 1 operation(s) for status.

LLMWhisperer Webhooks API

The Webhooks API from LLMWhisperer — 1 operation(s) for webhooks.

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

LLMWhisperer Extraction API

OPEN COLLECTION

LLMWhisperer Extraction Highlights API

OPEN COLLECTION

LLMWhisperer Extraction Retrieve API

OPEN COLLECTION

LLMWhisperer Extraction Status API

OPEN COLLECTION

LLMWhisperer Extraction Webhooks API

OPEN COLLECTION

LLMWhisperer API

OPEN COLLECTION

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Llmwhisperer Plans Pricing

3 plans

PLANS

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.

Llmwhisperer Finops

FINOPS

Security Posture 2

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

Llmwhisperer Authentication

apiKey · 1 scheme

SECURITY

Llmwhisperer Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Llmwhisperer Agentic Access

8 operations · 4 acting

AGENTIC

Resources

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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:
- Artificial Intelligence
- LLM
- Document Extraction
- OCR
- Text Extraction
tags_raw:
- AI
- LLM
- Document Extraction
- OCR
- Text Extraction
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
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: []
  tags_raw:
  - 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:
  - Webhook
  tags_raw:
  - 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

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