PDFfiller

PDFfiller is an online PDF editing and e-signature platform that provides a REST API for filling, editing, signing, converting, and managing PDF documents programmatically. The API enables developers to embed PDF editing, form-building, signature request workflows, and document management capabilities into their own applications. It is part of the airSlate family of products and supports OAuth 2.0 authentication with a base URL of https://api.pdffiller.com/v2/.

PDFfiller publishes 11 API contracts indexed on the APIs.io network, including Applications API, Auth API, Callbacks API, and 8 more. Tagged areas include PDF, E-Signature, Document Management, Form Builder, and PDF Editing.

The PDFfiller catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

PDFfiller’s developer surface includes authentication, documentation, engineering blog, pricing, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.7/100 thin ▬ flat Agent 23/100 agent aware Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

1 published contract

PDF E-Signature Document Management Form BuilderPDF EditingDocument Workflow

What this lets a business do 1

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

Developer Platform & API Ecosystem Management

BC-4270

Callbacks

POST /callbacks PUT /callbacks/global

Kin Score

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

Composite quality — 33.7/100 · thin

Contract Quality 10.7 / 19

Developer Ergonomics 4.7 / 15

Access Clarity 2.8 / 15

Operational Transparency 0.5 / 10

Contract Governance 0.9 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 23/100 · 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 0 / 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 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 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
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 18.4 — up to +16.3 composite points
Developer Ergonomics scores 31.0 — up to +13.8 composite points
Operational Transparency scores 5.3 — up to +12.3 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/pdffiller/apis.yml: open an issue on github.com/api-evangelist/pdffiller 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
Surveys, Market Research and Experience Management	builds-on	22.2	-	-
PDF and Document Standards (PDF tooling, document signing trust, invoice documents)	builds-on	22.2	-	-
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	22.2	-	-

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 11

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

PDFfiller Applications API

Manage OAuth applications

PDFfiller Auth API

OAuth 2.0 authentication token management

PDFfiller Callbacks API

Manage webhook callbacks for document events

PDFfiller Custom Logos API

Manage custom branding logos

PDFfiller Fillable Forms API

Manage fillable form links and submissions

PDFfiller Folders API

Organize documents into folders

PDFfiller Signature Requests API

Manage eSignature requests and workflows

PDFfiller Templates API

Manage PDF document templates

PDFfiller Tokens API

Manage embedded document tokens

PDFfiller Tools API

Document utility tools (merge, convert)

PDFfiller Users API

Retrieve current user information

Scroll for all 11

Open Collections 11

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

PDFfiller REST Applications API

OPEN COLLECTION

PDFfiller REST Applications Auth API

OPEN COLLECTION

PDFfiller REST Applications Callbacks API

OPEN COLLECTION

PDFfiller REST Applications Custom Logos API

OPEN COLLECTION

PDFfiller REST Applications Fillable Forms API

OPEN COLLECTION

PDFfiller REST Applications Folders API

OPEN COLLECTION

PDFfiller REST Applications Signature Requests API

OPEN COLLECTION

PDFfiller REST Applications Templates API

OPEN COLLECTION

PDFfiller REST Applications Tokens API

OPEN COLLECTION

PDFfiller REST Applications Tools API

OPEN COLLECTION

PDFfiller REST Applications Users API

OPEN COLLECTION

Scroll for all 11

PDFfiller API pricing

Not yet checked against PDFfiller's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free Trial	Free
Enterprise	$375
Volume	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Pdffiller Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Pdffiller Rate Limits

0 limits

RATE LIMITS

Service Levels 1

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

PDFfiller

SLA

FinOps 1

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

Pdffiller Finops

FINOPS

Semantic Vocabularies 1

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

Pdffiller Context

63 classes · 2 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

PDFfiller — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 3

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

FillableForm

22 properties

JSON SCHEMA

SignatureRequest

11 properties

JSON SCHEMA

Template

9 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Pdffiller Create Fillable Form Example

4 fields

EXAMPLE

Pdffiller Create Signature Request Example

4 fields

EXAMPLE

Pdffiller Oauth Token Example

4 fields

EXAMPLE

Security Posture 2

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

Pdffiller Authentication

oauth2 · 1 scheme

SECURITY

Pdffiller Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Pdffiller Scopes

2 scopes · password/clientCredentials

2 scopes

SCOPES

Agentic Access 1

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

Pdffiller Agentic Access

73 operations · 28 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 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: pdffiller
name: PDFfiller
description: PDFfiller is an online PDF editing and e-signature platform that provides a REST API for filling, editing, signing,
  converting, and managing PDF documents programmatically. The API enables developers to embed PDF editing, form-building,
  signature request workflows, and document management capabilities into their own applications. It is part of the airSlate
  family of products and supports OAuth 2.0 authentication with a base URL of https://api.pdffiller.com/v2/.
type: Index
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: true
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium (free trial) · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/pdffiller.png
url: https://raw.githubusercontent.com/api-evangelist/pdffiller/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
x-docs-platform: stoplight
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- PDF
- E-Signature
- Document Management
- Form Builder
- PDF Editing
- Document Workflow
tags_raw:
- PDF
- E-Signature
- Document Management
- Form Builder
- PDF Editing
- Electronic Signature
- Document Workflow
- Document-Management
apis:
- aid: pdffiller:pdffiller-applications-api
  name: PDFfiller Applications API
  description: Manage OAuth applications
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-applications-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-auth-api
  name: PDFfiller Auth API
  description: OAuth 2.0 authentication token management
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-auth-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-callbacks-api
  name: PDFfiller Callbacks API
  description: Manage webhook callbacks for document events
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Callbacks
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-callbacks-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-custom-logos-api
  name: PDFfiller Custom Logos API
  description: Manage custom branding logos
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Custom Logos
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-custom-logos-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-fillable-forms-api
  name: PDFfiller Fillable Forms API
  description: Manage fillable form links and submissions
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Fillable Forms
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-fillable-forms-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-folders-api
  name: PDFfiller Folders API
  description: Organize documents into folders
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Folders
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-folders-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-signature-requests-api
  name: PDFfiller Signature Requests API
  description: Manage eSignature requests and workflows
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Signature Requests
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-signature-requests-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-templates-api
  name: PDFfiller Templates API
  description: Manage PDF document templates
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-templates-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-tokens-api
  name: PDFfiller Tokens API
  description: Manage embedded document tokens
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Tokens
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-tokens-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-tools-api
  name: PDFfiller Tools API
  description: Document utility tools (merge, convert)
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - Tools
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-tools-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- aid: pdffiller:pdffiller-users-api
  name: PDFfiller Users API
  description: Retrieve current user information
  humanURL: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
  baseURL: https://api.pdffiller.com/v2/
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/pdffiller-users-api-openapi.yml
  - type: Documentation
    url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
common:
- type: CapabilityMap
  url: capabilities/pdffiller-capability-edges.yml
  name: PDFfiller Business Capability Map
- type: AgenticAccess
  url: agentic-access/pdffiller-agentic-access.yml
- type: DomainSecurity
  url: security/pdffiller-domain-security.yml
- type: Authentication
  url: authentication/pdffiller-authentication.yml
- type: OAuthScopes
  url: scopes/pdffiller-scopes.yml
- type: Website
  url: https://www.pdffiller.com
- type: Documentation
  url: https://docs.pdffiller.com/docs/pdffiller/zmnt034fyekxf-pdf-filler-api
- type: DeveloperPortal
  url: https://developers.pdffiller.com
- type: GitHubOrg
  url: https://github.com/pdffiller
- type: LinkedIn
  url: https://www.linkedin.com/company/pdffiller-com
- type: Blog
  url: https://blog.pdffiller.com
- type: Pricing
  url: https://www.pdffiller.com/en/pdf-api-pricing.htm
- type: X
  url: https://x.com/pdf_filler
- type: Plans
  url: plans/pdffiller-plans-pricing.yml
- type: RateLimits
  url: rate-limits/pdffiller-rate-limits.yml
- type: FinOps
  url: finops/pdffiller-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

PDFfiller API — frequently asked questions

Does PDFfiller have an API?

Yes. APIs.io lists 11 APIs from PDFfiller, including PDFfiller Applications API, PDFfiller Auth API and PDFfiller Callbacks API, and 8 more.

Is there an OpenAPI specification for the PDFfiller API?

Yes. APIs.io indexes 11 OpenAPI specifications for PDFfiller, each linked for download from this page.

How do I authenticate with the PDFfiller API?

PDFfiller documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Pdffiller Authentication.

How much does the PDFfiller API cost?

APIs.io lists 3 pricing plans for PDFfiller, with each plan's price, limits and inclusions under Pricing on this page.

Is the PDFfiller API ready for AI agents?

PDFfiller has a Kin Score of 33.7 out of 100 (thin) and an Agent Readiness score of 23.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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