SignNow

SignNow is an e-signature platform by airSlate that enables businesses to send, sign, and manage legally binding documents electronically. It provides a REST API for embedding e-signature workflows, document creation, template management, and bulk signing operations into any application.

SignNow publishes 7 API contracts indexed on the APIs.io network, including Authentication API, Documents API, Envelopes API, and 4 more. Tagged areas include E-Signature, Document Management, and Workflow Automation.

The SignNow catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

SignNow’s developer surface includes authentication, documentation, release notes, pricing, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

41.0/100 developing ▬ flat Agent 38/100 agent ready Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemiumSelf serve⚡ Free to try

1 published contract 2 MCP Servers

E-Signature Document Management Workflow Automation

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Legal Management

BC-150

EnvelopesSigning

POST /document/{document_id}/invite POST /template/{template_id}/bulkinvite POST /documentgroup

Developer Platform & API Ecosystem Management

BC-4270

Webhooks

GET /api/events POST /api/events

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 41.0/100 · developing

Contract Quality 10.2 / 19

Developer Ergonomics 6.8 / 15

Access Clarity 4.3 / 15

Operational Transparency 3.6 / 10

Contract Governance 1.2 / 9

Discoverability 4.5 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 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 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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/signnow: 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 →

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
Legal and E-Signature	builds-on	18.6	-	-

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.

APIs 7

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

SignNow Authentication API

OAuth2 token management

SignNow Documents API

Upload, manage, and retrieve documents

SignNow Envelopes API

Document group envelope management

SignNow Signing API

Send signature invitations and manage signers

SignNow Templates API

Create and manage document templates

SignNow Users API

User account management

SignNow Webhooks API

Event subscription and notification management

Scroll for all 7

Postman Collections 7

Ready-to-run Postman collections for exercising this provider's APIs.

SignNow REST Authentication API

POSTMAN

SignNow REST Authentication Documents API

POSTMAN

SignNow REST Authentication Envelopes API

POSTMAN

SignNow REST Authentication Signing API

POSTMAN

SignNow REST Authentication Templates API

POSTMAN

SignNow REST Authentication Users API

POSTMAN

SignNow REST Authentication Webhooks API

POSTMAN

Scroll for all 7

Open Collections 9

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

API Collection

OPEN COLLECTION

SignNow REST Authentication API

OPEN COLLECTION

SignNow REST Authentication Documents API

OPEN COLLECTION

SignNow REST Authentication Envelopes API

OPEN COLLECTION

SignNow REST Authentication Signing API

OPEN COLLECTION

SignNow REST Authentication Templates API

OPEN COLLECTION

SignNow REST Authentication Users API

OPEN COLLECTION

SignNow REST Authentication Webhooks API

OPEN COLLECTION

SignNow REST API

OPEN COLLECTION

Scroll for all 9

MCP Servers 2

Model Context Protocol servers that expose these APIs to AI agents.

MCP Server

MCP SERVER

SignNow MCP Server

Remote MCP server at mcp-server.signnow.com over HTTP.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Signnow Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Signnow Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Signnow Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Signnow Context

26 classes · 2 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

SignNow — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

SignNow API Rules

9 rules · 2 errors 6 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

SignNow Document

13 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Signnow Document Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Signnow Send Signature Invite Example

4 fields

EXAMPLE

Signnow Upload Document Example

4 fields

EXAMPLE

Security Posture 2

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

Signnow Authentication

http · 1 scheme

SECURITY

Signnow Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Signnow Agentic Access

22 operations · 12 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

MCPServer

MCPServer

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Security

Security

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

ReleaseNotes

ReleaseNotes

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

name: SignNow
description: SignNow is an e-signature platform by airSlate that enables businesses to send, sign, and manage legally binding
  documents electronically. It provides a REST API for embedding e-signature workflows, document creation, template management,
  and bulk signing operations into any application.
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: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/signnow.png
url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/apis.yml
created: '2026-05-02'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- E-Signature
- Document Management
- Workflow Automation
tags_raw:
- E-Signature
- Document Management
- Electronic Signature
- Workflow Automation
- Document-Management
- Workflow-Automation
apis:
- aid: signnow:signnow-authentication-api
  name: SignNow Authentication API
  description: OAuth2 token management
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/signnow-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-documents-api
  name: SignNow Documents API
  description: Upload, manage, and retrieve documents
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/signnow-documents-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-envelopes-api
  name: SignNow Envelopes API
  description: Document group envelope management
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Envelopes
  properties:
  - type: OpenAPI
    url: openapi/signnow-envelopes-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-signing-api
  name: SignNow Signing API
  description: Send signature invitations and manage signers
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Signing
  properties:
  - type: OpenAPI
    url: openapi/signnow-signing-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-templates-api
  name: SignNow Templates API
  description: Create and manage document templates
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/signnow-templates-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-users-api
  name: SignNow Users API
  description: User account management
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/signnow-users-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
- aid: signnow:signnow-webhooks-api
  name: SignNow Webhooks API
  description: Event subscription and notification management
  humanURL: https://docs.signnow.com/docs/signnow/welcome
  baseURL: https://api.signnow.com
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/signnow-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.signnow.com/docs/signnow/welcome
  - type: Authentication
    url: https://docs.signnow.com/docs/signnow/get-started
  - type: SDKs
    url: https://docs.signnow.com/docs/signnow/sdk
  - type: GitHubOrganization
    url: https://github.com/signnow
  - type: PostmanCollection
    url: https://github.com/signnow/postman-collection
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/signnow/refs/heads/main/rules/signnow-rules.yml
common:
- type: Plans
  url: plans/signnow-plans-pricing.yml
- type: RateLimits
  url: rate-limits/signnow-rate-limits.yml
- type: FinOps
  url: finops/signnow-finops.yml
- type: CapabilityMap
  url: capabilities/signnow-capability-edges.yml
  name: SignNow Business Capability Map
- type: Website
  url: https://www.signnow.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/signnow/overview
- type: AgenticAccess
  url: agentic-access/signnow-agentic-access.yml
- type: DomainSecurity
  url: security/signnow-domain-security.yml
- type: Authentication
  url: authentication/signnow-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/signnow-esignature
- type: GitHubOrganization
  url: https://github.com/signnow
- type: DeveloperPortal
  url: https://www.signnow.com/developers
- type: Documentation
  url: https://docs.signnow.com
- type: ReleaseNotes
  url: https://www.signnow.com/release-notes/signnow-api
- type: Pricing
  url: https://www.signnow.com/pricing
- type: TermsOfService
  url: https://www.signnow.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.signnow.com/privacy-policy
- type: Security
  url: https://www.signnow.com/security
- type: Integrations
  url: https://www.signnow.com/integrations
- url: https://www.signnow.com/blog/
  type: Blog
- name: MCP Server
  url: https://github.com/signnow/sn-api-helper-mcp
  type: MCPServer
integrations:
- name: Salesforce
- name: Google Workspace
- name: Netsuite
- name: Autodesk
- name: Gmail
- name: Excel
- name: Browser
- name: CRM System
- name: Accounting Software
- name: Employee Intranet Service
- name: Internal Communications Software
- name: ECM Software
- name: ERP Systems
- name: Marketing Automation Software
- name: Cloud Content Collaboration Services
- name: OCR Software
- name: HR Management Suites
- name: Relational Databases
- name: iPaaS
- name: Payroll System
- name: Benefits Administration Service
- name: Project Management Software
- name: Task Management Service
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: info@apievangelist.com

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