eSignSimple

eSignSimple provides an online eSignature platform allowing freelancers and small businesses to upload Word documents or PDFs, add signature fields, and send them for signing. Signers can complete documents without creating an account, and every transaction includes a full audit trail. The service offers free plans, bulk sending, templates, web forms, and an API for developers to integrate signing functionality into their applications. Features include document storage, customizable branding, and compliance with eSignature legality across multiple jurisdictions.

eSignSimple publishes 4 API contracts indexed on the APIs.io network, including Account API, Documents API, Templates API, and 1 more. Tagged areas include E-Signature, Templates, Bulk Sending, Web Forms, and ID Verification.

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

eSignSimple’s developer surface includes signup flow, authentication, documentation, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

48.7/100 developing Agent 28/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 2 Agent Skills

E-Signature Templates Bulk Sending Web Forms ID Verification

Kin Score

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

Composite quality — 48.7/100 · developing

Contract Quality 14.7 / 21

Developer Ergonomics 3.9 / 17

Access Clarity 11.2 / 17

Operational Transparency 1.8 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.4 / 15

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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 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 →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

7 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 23.2 — up to +15.4 composite points Ask about this →
Operational Transparency scores 16.7 — up to +10.8 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 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/esignsimple-com/apis.yml: open an issue on github.com/api-evangelist/esignsimple-com 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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

eSignSimple Account API

The Account API from eSignSimple — 1 operation(s) for account.

eSignSimple Documents API

The Documents API from eSignSimple — 4 operation(s) for documents.

eSignSimple Templates API

The Templates API from eSignSimple — 2 operation(s) for templates.

eSignSimple Verification API

Public, no key needed.

Agent Skills 2

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

esignsimple-com-create-and-download-document

AGENT SKILL

esignsimple-com-send-template

AGENT SKILL

eSignSimple API pricing

Prices published by eSignSimple, read 2026-11-10 from esignsimple.com/pricing.

Plan	Price
Free	$0/mo
Bronze	$4.99/mo or $39.99/year
Silver	$9.99/mo or $89.99/year
Gold	$19.99/mo or $179.99/year

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

eSignSimple Plans Pricing

4 plans

PLANS

Event Specifications 1

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

Esignsimple Com Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Esignsimple Com Context

7 classes · 34 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.

eSignSimple API Rules

58 rules · 53 error-severity 1 warn-severity 4 info-severity

SPECTRAL

JSON Schema 6

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

Account

6 properties

JSON SCHEMA

CreateDocumentData

6 properties

JSON SCHEMA

Document

13 properties

JSON SCHEMA

DocumentWithEvents

14 properties

JSON SCHEMA

SignerInput

2 properties

JSON SCHEMA

Template

7 properties

JSON SCHEMA

Security Posture 3

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

eSignSimple Authentication

http · 1 scheme

SECURITY

eSignSimple Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

eSignSimple Trust Center

SOC 2, ISO 27001

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

eSignSimple Agentic Access

10 operations · 4 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 5

Authentication, authorization, and security posture

Compliance

Security

Authentication

TrustCenter

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: esignsimple-com
name: eSignSimple
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://esignsimple.com/og?t=eSignSimple%20%E2%80%94%20Sign%20Docs%20%26%20PDFs%20Online
description: eSignSimple provides an online eSignature platform allowing freelancers and small businesses to upload Word documents
  or PDFs, add signature fields, and send them for signing. Signers can complete documents without creating an account, and
  every transaction includes a full audit trail. The service offers free plans, bulk sending, templates, web forms, and an
  API for developers to integrate signing functionality into their applications. Features include document storage, customizable
  branding, and compliance with eSignature legality across multiple jurisdictions.
url: https://artifacts.apis.io/esignsimple-com/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- E-Signature
- Templates
- Bulk Sending
- Web Forms
- ID Verification
tags_raw:
- eSignature
- Document signing
- Templates
- Bulk sending
- Web forms
- API
- ID verification
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/esignsimple-com-agentic-access.yml
- type: Plans
  url: plans/esignsimple-com-plans-pricing.yml
- type: Spectral
  url: rules/esignsimple-com-rules.yml
- type: JSONLD
  url: json-ld/esignsimple-com-context.jsonld
- type: Vocabulary
  url: vocabulary/esignsimple-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/esignsimple-com-webhooks.yml
- type: DataModel
  url: data-model/esignsimple-com-data-model.yml
- type: Compliance
  url: https://esignsimple.com/security
- type: ErrorCatalog
  url: errors/esignsimple-com-problem-types.yml
- type: Conformance
  url: conformance/esignsimple-com-conformance.yml
- type: LLMsTxt
  url: llms/esignsimple-com-llms.txt
- type: Hosts
  url: hosts/esignsimple-com-hosts.yml
- type: Vendors
  url: vendors/esignsimple-com-vendors.yml
- type: TermsOfService
  url: https://esignsimple.com/legal/terms
- type: SignUp
  url: https://esignsimple.com/signup
- type: Security
  url: https://esignsimple.com/security
- type: PrivacyPolicy
  url: https://esignsimple.com/legal/privacy
- type: Authentication
  url: authentication/esignsimple-com-authentication.yml
- type: TrustCenter
  url: security/esignsimple-com-trust-center.yml
- type: DomainSecurity
  url: security/esignsimple-com-domain-security.yml
- type: Website
  url: https://esignsimple.com
- type: Documentation
  url: https://esignsimple.com/developers
apis:
- aid: esignsimple-com:esignsimple-com-account-api
  name: eSignSimple Account API
  description: The Account API from eSignSimple — 1 operation(s) for account.
  humanURL: https://esignsimple.com/developers
  baseURL: https://esignsimple.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/esignsimple-com-account-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-template-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-create-document-data-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-with-events-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-account-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-signer-input-schema.json
- aid: esignsimple-com:esignsimple-com-documents-api
  name: eSignSimple Documents API
  description: The Documents API from eSignSimple — 4 operation(s) for documents.
  humanURL: https://esignsimple.com/developers
  baseURL: https://esignsimple.com
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/esignsimple-com-documents-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-template-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-create-document-data-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-with-events-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-account-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-signer-input-schema.json
- aid: esignsimple-com:esignsimple-com-templates-api
  name: eSignSimple Templates API
  description: The Templates API from eSignSimple — 2 operation(s) for templates.
  humanURL: https://esignsimple.com/developers
  baseURL: https://esignsimple.com
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/esignsimple-com-templates-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-template-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-create-document-data-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-with-events-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-account-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-signer-input-schema.json
- aid: esignsimple-com:esignsimple-com-verification-api
  name: eSignSimple Verification API
  description: Public, no key needed.
  humanURL: https://esignsimple.com/developers
  baseURL: https://esignsimple.com
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/esignsimple-com-verification-api-openapi.yml
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-template-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-create-document-data-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-document-with-events-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-account-schema.json
  - type: JSONSchema
    url: json-schema/esignsimple-com-signer-input-schema.json
properties:
- type: Pricing
  url: https://esignsimple.com/pricing
- type: Blog
  url: https://esignsimple.com/blog
- type: TermsOfService
  url: https://esignsimple.com/terms
- type: PrivacyPolicy
  url: https://esignsimple.com/privacy
x-submission-notes: E-signature REST API v1 for freelancers/SMBs
x-submission-probe: 2026-11-10 root 200, ctl 404; /developers 200
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

eSignSimple API — frequently asked questions

Does eSignSimple have an API?

Yes. APIs.io lists 4 APIs from eSignSimple, including eSignSimple Account API, eSignSimple Documents API and eSignSimple Templates API, and 1 more.

Is there an OpenAPI specification for the eSignSimple API?

Yes. APIs.io indexes 4 OpenAPI specifications for eSignSimple, each linked for download from this page.

How do I authenticate with the eSignSimple API?

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

How much does the eSignSimple API cost?

eSignSimple publishes its prices; its Free plan is $0/mo as of 2026-11-10. APIs.io lists 4 pricing plans for eSignSimple, with each plan's price, limits and inclusions under Pricing on this page.

Is the eSignSimple API ready for AI agents?

eSignSimple has a Kin Score of 48.7 out of 100 (developing) and an Agent Readiness score of 27.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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