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 API contracts indexed on the APIs.io network: Authentication API, Platform API, and Sign API. Tagged areas include Company, PDF, Documents, E-Signature, and Document Management.

The Nitro Software catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Nitro Software’s developer surface includes authentication, documentation, API reference, getting-started guide, changelog, pricing, engineering blog, and 26 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

64.0/100 strong ▬ flat Agent 36/100 agent ready saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 3 Agent Skills

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

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 64.0/100 · strong

Contract Quality 10.6 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 12.8 / 15

Operational Transparency 5.6 / 10

Contract Governance 2.9 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.3 / 15

Create-or-Update Ergonomics 0.0 / 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

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 56.5 — up to +10.9 composite points
Developer Ergonomics scores 58.9 — up to +8.2 composite points
Contract Governance scores 31.8 — up to +8.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/nitro-software/apis.yml: open an issue on github.com/api-evangelist/nitro-software to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
RPA and Document AI (RPA marketplaces, intelligent document processing)	standard	51.7	-	-
PDF and Document Standards (PDF tooling, document signing trust, invoice documents)	standard	51.7	-	-
Vulnerability Disclosure (CVE Numbering Authorities, FIRST member teams; CISA KEV exposure)	standard	51.7	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

PDF

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 3

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

Nitro Software Authentication API

The Authentication API from Nitro Software — 1 operation(s) for authentication.

Nitro Software Platform API

The Platform API from Nitro Software — 6 operation(s) for platform.

Nitro Software Sign API

The Sign API from Nitro Software — 22 operation(s) for sign.

Open Collections 3

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

Nitro Sign Public Authentication API

OPEN COLLECTION

Nitro Sign Public Authentication Platform API

OPEN COLLECTION

Nitro Public Authentication Sign API

OPEN COLLECTION

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Track and collect signed documents from Nitro Sign

AGENT SKILL

Run an async Nitro PDF Services job

AGENT SKILL

Send an envelope for signature with Nitro Sign

AGENT SKILL

Nitro Software API pricing

Prices published by Nitro Software, read 2026-10-28 from www.gonitro.com/pricing.

Plan	Price
Nitro PDF Standard	per user/month annually
Nitro PDF Plus	Contact Sales
Nitro PDF Classic	per license/billed once
Nitro Sign Standard	per user/month annually
Nitro Sign Plus	Contact Sales
Nitro Sign Enterprise	Contact Sales

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Nitro Software Plans Pricing

6 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Nitro Software

SLA

FinOps 1

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

Nitro Software Finops

FINOPS

Event Specifications 1

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

Nitro Software Sign Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Nitro Software API Rules

54 rules · 35 errors 13 warnings 6 info

SPECTRAL

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.

Nitro Software Openapi Overlay

3 actions · update · nitro-software-openapi-original.json

DERIVED

Security Posture 4

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

Nitro Software Authentication

http/oauth2 · 1 scheme

SECURITY

Nitro Software Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Nitro Software Vulnerability Disclosure

contact published

SECURITY

Nitro Software Trust Center

SOC 2, ISO 27001, HIPAA, eIDAS QTSP, EU-U.S. Data Privacy Framework

SECURITY

Agentic Access 1

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

Nitro Software Agentic Access

39 operations · 24 acting

AGENTIC

Resources

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 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.gonitro.com/favicon.ico
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- PDF
- Documents
- E-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
- Document-Management
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: Plans
  url: plans/nitro-software-plans-pricing.yml
- type: Website
  url: https://www.gonitro.com/
- 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

Nitro Software API — frequently asked questions

Does Nitro Software have an API?

Yes. APIs.io lists 3 APIs from Nitro Software, including Nitro Software Authentication API, Nitro Software Platform API and Nitro Software Sign API.

Is there an OpenAPI specification for the Nitro Software API?

Yes. APIs.io indexes 3 OpenAPI specifications for Nitro Software, each linked for download from this page.

How do I authenticate with the Nitro Software API?

Nitro Software uses bearer-token authentication (http/oauth2 · 1 scheme). The details are profiled on APIs.io as Nitro Software Authentication.

How much does the Nitro Software API cost?

Nitro Software publishes its prices; its Nitro PDF Standard plan is per user/month annually as of 2026-10-28. APIs.io lists 6 pricing plans for Nitro Software, with each plan's price, limits and inclusions under Pricing on this page.

Is the Nitro Software API ready for AI agents?

Nitro Software has a Kin Score of 64.0 out of 100 (strong) and an Agent Readiness score of 35.8 (agent-ready), scored by API Evangelist on 2026-11-06.

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