Inkfree

Inkfree provides a cloud‑based eSignature platform that enables businesses to send, sign, and manage legally binding documents online. The service supports bulk sending, approval workflows, signing order, in‑person signing, and web‑form integrations. It complies with ESIGN, UETA, and eIDAS, offering AES‑256 encryption, audit trails, and two‑factor authentication. Inkfree serves industries such as real estate, healthcare, financial services, legal, insurance, and more, offering free and paid plans for teams of any size.

Inkfree is listed with 2 APIs on the APIs.io network. Tagged areas include E-Signature, Software-as-a-Service, Cloud, and Document Management.

The Inkfree catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Inkfree’s developer surface includes authentication, support, pricing, documentation, API reference, getting-started guide, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.4/100 developing Agent 42/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

2 APIs

E-Signature Software-as-a-Service Cloud Document Management

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 46.4/100 · developing

Contract Quality 7.7 / 21

Developer Ergonomics 7.7 / 17

Access Clarity 10.5 / 17

Operational Transparency 4.5 / 11

Contract Governance 3.6 / 10

Discoverability 5.0 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 42/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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 Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

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 36.1 — up to +16.0 composite points Ask about this →
Developer Ergonomics scores 45.2 — up to +11.0 composite points Ask about this →
Operational Transparency scores 40.5 — up to +7.7 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/inkfree-app/apis.yml: open an issue on github.com/api-evangelist/inkfree-app 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 →

Standards implemented 2

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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 2

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

Inkfree API

Inkfree REST API documented at https://inkfree.app/docs/api/reference/

Inkfree API

Inkfree API as documented publicly: 32 operations. Contract generated from the documentation by API Evangelist (2026-11-12); not the provider's own document.

Inkfree API pricing

Prices published by Inkfree, read 2026-11-12 from inkfree.app/pricing/.

Plan	Price
Free	$0/Forever
Basic	$15.00/seat/month
Standard	$35.00/seat/month
Business	$50.00/seat/month

Plan details, limits and sources →

Rate limits

default: 60 requests per minute

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Inkfree Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Inkfree Rate Limits

1 limits

RATE LIMITS

Event Specifications 1

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

Inkfree App Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Inkfree App Context

33 classes · 74 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Inkfree API Rules

46 rules · 44 error-severity 1 warn-severity 1 info-severity

SPECTRAL

JSON Schema 6

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

GetApiV1InkfreeEnvelopesResponse

5 properties

JSON SCHEMA

GetApiV1InkfreeMeResponse

12 properties

JSON SCHEMA

GetApiV1InkfreeSignersResponse

6 properties

JSON SCHEMA

GetApiV1InkfreeWebhooksResponse

7 properties

JSON SCHEMA

PostApiV1InkfreeEnvelopesIdSignersEmailDelegateRequest

23 properties

JSON SCHEMA

PostApiV1InkfreeEnvelopesRequest

6 properties

JSON SCHEMA

Security Posture 2

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

Inkfree Authentication

1 scheme

SECURITY

Inkfree Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Idempotency

Conventions

Conformance

Scroll for all 8

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Source (apis.yml)

aid: inkfree-app
name: Inkfree
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
image: https://inkfree.app/og/home.webp
description: Inkfree provides a cloud‑based eSignature platform that enables businesses to send, sign, and manage legally
  binding documents online. The service supports bulk sending, approval workflows, signing order, in‑person signing, and web‑form
  integrations. It complies with ESIGN, UETA, and eIDAS, offering AES‑256 encryption, audit trails, and two‑factor authentication.
  Inkfree serves industries such as real estate, healthcare, financial services, legal, insurance, and more, offering free
  and paid plans for teams of any size.
url: https://artifacts.apis.io/inkfree-app/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-12 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-12'
modified: '2026-11-12'
tags:
- E-Signature
- Software-as-a-Service
- Cloud
- Document Management
tags_raw:
- eSignature
- SaaS
- Cloud
- API
- DocumentManagement
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/inkfree-app-rate-limits.yml
- type: Plans
  url: plans/inkfree-app-plans-pricing.yml
- type: Spectral
  url: rules/inkfree-app-rules.yml
- type: JSONLD
  url: json-ld/inkfree-app-context.jsonld
- type: Vocabulary
  url: vocabulary/inkfree-app-vocabulary.yml
- type: Webhooks
  url: asyncapi/inkfree-app-webhooks.yml
- type: DataModel
  url: data-model/inkfree-app-data-model.yml
- type: Idempotency
  url: conventions/inkfree-app-conventions.yml
- type: Conventions
  url: conventions/inkfree-app-conventions.yml
- type: Authentication
  url: authentication/inkfree-app-authentication.yml
- type: Conformance
  url: conformance/inkfree-app-conformance.yml
- type: LLMsTxt
  url: llms/inkfree-app-llms.txt
- type: WellKnown
  url: well-known/inkfree-app-well-known.yml
- type: Hosts
  url: hosts/inkfree-app-hosts.yml
- type: Vendors
  url: vendors/inkfree-app-vendors.yml
- type: TermsOfService
  url: https://inkfree.app/terms/
- type: Support
  url: https://inkfree.app/help/
- type: StatusPage
  url: https://status.inkfree.app
- type: PrivacyPolicy
  url: https://inkfree.app/privacy-policy/
- type: Pricing
  url: https://inkfree.app/pricing/
- type: Login
  url: https://sign.inkfree.app/login
- type: Leadership
  url: https://inkfree.app/teams/management/
- type: Documentation
  url: https://inkfree.app/docs/
- type: APIReference
  url: https://inkfree.app/docs/api/reference/
- type: GettingStarted
  url: https://inkfree.app/docs/quickstart/
- type: DomainSecurity
  url: security/inkfree-app-domain-security.yml
- type: Website
  url: https://inkfree.app/
apis:
- name: Inkfree API
  description: Inkfree REST API documented at https://inkfree.app/docs/api/reference/
  humanURL: https://inkfree.app/docs/api/reference/
  baseURL: https://services.softsages.com/core
  aid: inkfree-app:inkfree-api
- aid: inkfree-app:inkfree-app-api
  name: Inkfree API
  description: 'Inkfree API as documented publicly: 32 operations. Contract generated from the documentation by API Evangelist
    (2026-11-12); not the provider''s own document.'
  humanURL: https://inkfree.app/docs/api/signers
  baseURL: https://services.softsages.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/inkfree-app-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/inkfree-app-post-api-v1-inkfree-envelopes-id-signers-email-delegate-request-schema.json
  - type: JSONSchema
    url: json-schema/inkfree-app-get-api-v1-inkfree-me-response-schema.json
  - type: JSONSchema
    url: json-schema/inkfree-app-post-api-v1-inkfree-envelopes-request-schema.json
  - type: JSONSchema
    url: json-schema/inkfree-app-get-api-v1-inkfree-signers-response-schema.json
  - type: JSONSchema
    url: json-schema/inkfree-app-get-api-v1-inkfree-webhooks-response-schema.json
  - type: JSONSchema
    url: json-schema/inkfree-app-get-api-v1-inkfree-envelopes-response-schema.json
x-enrichment:
  date: '2026-11-12'
  status: enriched
  artifacts_added: 31
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Inkfree API — frequently asked questions

Does Inkfree have an API?

Yes. APIs.io lists 2 APIs from Inkfree, including Inkfree API and Inkfree API.

Is there an OpenAPI specification for the Inkfree API?

Yes. APIs.io indexes 1 OpenAPI specification for Inkfree, each linked for download from this page.

How do I authenticate with the Inkfree API?

Inkfree documents its authentication (1 scheme). The details are profiled on APIs.io as Inkfree Authentication.

How much does the Inkfree API cost?

Inkfree publishes its prices; its Free plan is $0/Forever as of 2026-11-12. APIs.io lists 4 pricing plans for Inkfree, with each plan's price, limits and inclusions under Pricing on this page.

Is the Inkfree API ready for AI agents?

Inkfree has a Kin Score of 46.4 out of 100 (developing) and an Agent Readiness score of 41.7 (agent-ready), scored by API Evangelist on 2026-11-13.

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