Nitro Software

Nitro Software is a document productivity company (San Francisco, CA; part of the Nitro Productivity Platform) offering PDF editing, eSignature (Nitro Sign), and document intelligence. Nitro publishes a public developer platform of REST APIs at developers.gonitro.com covering two surfaces: a PDF Services / Document Intelligence Platform API (convert, extract, transform, redact, OCR, generate/fill forms) and the Nitro Sign API (envelopes, documents, participants, fields, sealing, audit trails, and signer signing URLs). The APIs use machine-to-machine OAuth 2.0 client-credentials with short-lived bearer JWTs, RFC 9457 problem+json errors, cursor pagination, asynchronous jobs with callbacks, and RFC 9421 signed Sign webhooks. API access requires a Nitro Sign Enterprise plan.

Nitro Software publishes 3 APIs on the APIs.io network: Authentication API, Platform API, and Sign API. Tagged areas include Company, PDF, Documents, E-Signature, and Electronic Signature.

The Nitro Software catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Nitro Software’s developer surface includes authentication, documentation, API reference, getting-started guide, changelog, pricing, engineering blog, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

55.3/100 strong ▬ flat Agent 36/100 agent ready saas Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0

AccessSelf serve

1 APIs

Company PDF Documents E-Signature Electronic Signature Document-Management Document Intelligence OCR Data Extraction Productivity

Kin Score

Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0

Composite quality — 55.3/100 · strong

Contract Quality 15.5 / 25

Developer Ergonomics 11.8 / 20

Access Clarity 10.8 / 20

Operational Transparency 7.5 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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/nitro-software: 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 3

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

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Webhooks

Idempotency

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Scroll for all 7

Access & Security 6

Authentication, authorization, and security posture

Authentication

Authentication

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

TrustCenter

TrustCenter

Compliance

Compliance

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

ChangeLog

StatusPage

Deprecation

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: nitro-software
name: Nitro Software
description: 'Nitro Software is a document productivity company (San Francisco, CA; part of the Nitro Productivity Platform)
  offering PDF editing, eSignature (Nitro Sign), and document intelligence. Nitro publishes a public developer platform of
  REST APIs at developers.gonitro.com covering two surfaces: a PDF Services / Document Intelligence Platform API (convert,
  extract, transform, redact, OCR, generate/fill forms) and the Nitro Sign API (envelopes, documents, participants, fields,
  sealing, audit trails, and signer signing URLs). The APIs use machine-to-machine OAuth 2.0 client-credentials with short-lived
  bearer JWTs, RFC 9457 problem+json errors, cursor pagination, asynchronous jobs with callbacks, and RFC 9421 signed Sign
  webhooks. API access requires a Nitro Sign Enterprise plan.'
url: https://raw.githubusercontent.com/api-evangelist/nitro-software/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: enriched
x-tier-reason: portfolio-lead
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: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.gonitro.com/favicon.ico
tags:
- Company
- PDF
- Documents
- E-Signature
- Electronic Signature
- Document-Management
- Document Intelligence
- OCR
- Data Extraction
- Productivity
tags_raw:
- Company
- PDF
- Documents
- eSignature
- Electronic Signature
- Document Management
- Document Intelligence
- OCR
- Data Extraction
- Productivity
apis:
- aid: nitro-software:nitro-software-authentication-api
  name: Nitro Software Authentication API
  description: The Authentication API from Nitro Software — 1 operation(s) for authentication.
  humanURL: https://developers.gonitro.com/docs
  baseURL: https://api.gonitro.dev
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/nitro-software-authentication-api-openapi.yml
  - type: Documentation
    url: https://developers.gonitro.com/docs
  - type: APIReference
    url: https://developers.gonitro.com/docs/api-reference/sign/list-envelopes
  - type: GettingStarted
    url: https://developers.gonitro.com/docs/getting-started/basic-setup
  - type: Authentication
    url: authentication/nitro-software-authentication.yml
- aid: nitro-software:nitro-software-platform-api
  name: Nitro Software Platform API
  description: The Platform API from Nitro Software — 6 operation(s) for platform.
  humanURL: https://developers.gonitro.com/docs
  baseURL: https://api.gonitro.dev
  tags:
  - Platform
  properties:
  - type: OpenAPI
    url: openapi/nitro-software-platform-api-openapi.yml
  - type: Documentation
    url: https://developers.gonitro.com/docs
  - type: APIReference
    url: https://developers.gonitro.com/docs/api-reference/sign/list-envelopes
  - type: GettingStarted
    url: https://developers.gonitro.com/docs/getting-started/basic-setup
  - type: Authentication
    url: authentication/nitro-software-authentication.yml
- aid: nitro-software:nitro-software-sign-api
  name: Nitro Software Sign API
  description: The Sign API from Nitro Software — 22 operation(s) for sign.
  humanURL: https://developers.gonitro.com/docs
  baseURL: https://api.gonitro.dev
  tags:
  - Sign
  properties:
  - type: OpenAPI
    url: openapi/nitro-software-sign-api-openapi.yml
  - type: Documentation
    url: https://developers.gonitro.com/docs
  - type: APIReference
    url: https://developers.gonitro.com/docs/api-reference/sign/list-envelopes
  - type: GettingStarted
    url: https://developers.gonitro.com/docs/getting-started/basic-setup
  - type: Authentication
    url: authentication/nitro-software-authentication.yml
common:
- type: AgenticAccess
  url: agentic-access/nitro-software-agentic-access.yml
- type: Authentication
  url: authentication/nitro-software-authentication.yml
- type: DeveloperPortal
  url: https://developers.gonitro.com/docs
- type: Documentation
  url: https://developers.gonitro.com/docs
- type: APIReference
  url: https://developers.gonitro.com/docs/api-reference/sign/list-envelopes
- type: GettingStarted
  url: https://developers.gonitro.com/docs/getting-started/basic-setup
- type: ChangeLog
  url: changelog/nitro-software-changelog.yml
- type: StatusPage
  url: https://status.gonitro.com
- type: Deprecation
  url: lifecycle/nitro-software-lifecycle.yml
- type: Webhooks
  url: asyncapi/nitro-software-sign-webhooks.yml
- type: Security
  url: https://www.gonitro.com/security-compliance/security/responsible-disclosure
- type: VulnerabilityDisclosure
  url: security/nitro-software-vulnerability-disclosure.yml
- type: TrustCenter
  url: https://www.gonitro.com/trust-center
- type: Compliance
  url: https://www.gonitro.com/security
- type: DomainSecurity
  url: security/nitro-software-domain-security.yml
- type: Pricing
  url: https://www.gonitro.com/pricing
- type: Login
  url: https://admin.gonitro.com
- type: TermsOfService
  url: https://www.gonitro.com/legal/pdf-sign/terms-of-service
- type: PrivacyPolicy
  url: https://www.gonitro.com/legal/privacy-policy
- type: Blog
  url: https://www.gonitro.com/blog
- type: Support
  url: https://community.gonitro.com
- type: Idempotency
  url: conventions/nitro-software-conventions.yml
- type: Conventions
  url: conventions/nitro-software-conventions.yml
- type: ErrorCatalog
  url: errors/nitro-software-problem-types.yml
- type: Lifecycle
  url: lifecycle/nitro-software-lifecycle.yml
- type: DataModel
  url: data-model/nitro-software-data-model.yml
- type: Conformance
  url: conformance/nitro-software-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/nitro-software-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/nitro-software-llms.txt
- type: Overlay
  url: overlays/nitro-software-openapi-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 22
  pass: local-v1

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Nitro Software

Kin Score

APIs 3

Nitro Software Authentication API

Nitro Software Platform API

Nitro Software Sign API

Open Collections 4

API Collection

Nitro Sign Public Authentication API

Nitro Sign Public Authentication Platform API

Nitro Public Authentication Sign API

Event Specifications 1

Nitro Software Sign Webhooks

Security Posture 4

Nitro Software Authentication

Nitro Software Domain Security

Nitro Software Vulnerability Disclosure

Nitro Software Trust Center

Agentic Access 1

Nitro Software Agentic Access

Resources