Nutrient.io

Nutrient (formerly PSPDFKit) provides a powerful and secure document processing platform via Document Web Services (DWS). Fast and easy integration enables instant generation, conversion, modification, and digital signing of PDF documents, plus accessibility tagging and AI-powered document workflows.

Nutrient.io publishes 4 APIs on the APIs.io network. Tagged areas include Documents, PDF, Document Processing, eSignature, and Accessibility.

Nutrient.io’s developer surface includes documentation, getting-started guide, pricing, engineering blog, signup flow, support, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.3/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1

AccessFreemium

4 APIs

DocumentsPDFDocument ProcessingeSignatureAccessibilityOCR

Kin Score

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

Composite quality — 38.3/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 6.5 / 20

Commercial Clarity 18.4 / 20

Operational Transparency 6.8 / 13

Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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/nutrient-io: 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 4

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

Rate Limits 1

Documented rate limits and quota policies.

Nutrient Io Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Signup

Signup

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

Reference

Reference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: nutrient-io
name: Nutrient.io
description: Nutrient (formerly PSPDFKit) provides a powerful and secure document processing platform via Document Web Services
  (DWS). Fast and easy integration enables instant generation, conversion, modification, and digital signing of PDF documents,
  plus accessibility tagging and AI-powered document workflows.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nutrient-io.png
tags:
- Documents
- PDF
- Document Processing
- eSignature
- Accessibility
- OCR
created: '2025-02-08'
modified: '2026-04-28'
url: https://raw.githubusercontent.com/api-evangelist/nutrient-io/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: nutrient-io:viewer-api
  name: Nutrient Viewer API
  description: Deliver rich document interactions directly in the browser including PDF rendering, annotation, form filling,
    and signature collection.
  humanURL: https://www.nutrient.io/api/viewer-api/
  tags:
  - Viewer
  - Annotations
  - Forms
  - Signatures
  properties:
  - type: Documentation
    url: https://www.nutrient.io/api/viewer-api/
  - type: Reference
    url: https://www.nutrient.io/api/reference/public/
  - type: GettingStarted
    url: https://www.nutrient.io/guides/dws-viewer-api/
- aid: nutrient-io:processor-api
  name: Nutrient Processor API
  description: Headless cloud document workflow API for generation, conversion, extraction, OCR, and automation across PDFs
    and Office documents.
  humanURL: https://www.nutrient.io/api/processor-api/
  tags:
  - Processing
  - Conversion
  - OCR
  - Extraction
  properties:
  - type: Documentation
    url: https://www.nutrient.io/api/processor-api/
  - type: Reference
    url: https://www.nutrient.io/api/reference/public/
  - type: GettingStarted
    url: https://www.nutrient.io/guides/dws-processor/getting-started/
- aid: nutrient-io:accessibility-api
  name: Nutrient Accessibility API
  description: Automate PDF accessibility through cloud-based auto-tagging and validation to support compliance with WCAG
    and PDF/UA standards.
  humanURL: https://www.nutrient.io/api/accessibility-api/
  tags:
  - Accessibility
  - PDF/UA
  - WCAG
  - Tagging
  properties:
  - type: Documentation
    url: https://www.nutrient.io/api/accessibility-api/
  - type: Reference
    url: https://www.nutrient.io/api/reference/public/
- aid: nutrient-io:ai-api
  name: Nutrient AI API
  description: AI-powered document workflows including extraction, classification, and analysis built on top of the Nutrient
    document platform.
  humanURL: https://www.nutrient.io/api/ai/
  tags:
  - AI
  - Extraction
  - Classification
  properties:
  - type: Documentation
    url: https://www.nutrient.io/api/ai/
common:
- type: TrustCenter
  url: security/nutrient-io-trust-center.yml
- type: DomainSecurity
  url: security/nutrient-io-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/pspdfkit
- type: LinkedIn
  url: https://www.linkedin.com/company/nutrient-sdk
- type: Website
  url: https://www.nutrient.io
- type: Documentation
  url: https://www.nutrient.io/api/
- type: Reference
  url: https://www.nutrient.io/api/reference/public/
- type: GettingStarted
  url: https://www.nutrient.io/guides/dws-processor/getting-started/
- type: Pricing
  url: https://www.nutrient.io/pricing/
- type: Blog
  url: https://www.nutrient.io/blog/
- type: Signup
  url: https://dashboard.nutrient.io/sign_up
- type: Login
  url: https://dashboard.nutrient.io/sign_in
- type: Support
  url: https://www.nutrient.io/support/
- type: StatusPage
  url: https://status.nutrient.io/
- type: TermsOfService
  url: https://www.nutrient.io/legal/terms-of-service/
- type: PrivacyPolicy
  url: https://www.nutrient.io/legal/privacy/
- type: Integrations
  url: https://www.nutrient.io/partners/
- type: LlmsText
  url: https://www.nutrient.io/llms.txt
integrations:
- name: Nutrient
- name: Cloud
- name: Workflow
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Nutrient.io

Kin Score

APIs 4

Nutrient Viewer API

Nutrient Processor API

Nutrient Accessibility API

Nutrient AI API

Pricing Plans 1

Nutrient Io Plans Pricing