Formspree

Formspree is a form backend for static and Jamstack sites. Two API surfaces matter: (1) the public form-submission endpoint (formspree.io/f/{hashid}) that accepts POST submissions and returns JSON when the Accept header is set, and (2) the Forms API (formspree.io/api/0/...) for programmatic submission retrieval, export and form management. Plugins and the Formspree CLI extend the surface.

Formspree publishes 1 API on the APIs.io network: Forms API. Tagged areas include Forms, Backend, Static Sites, Email, and Webhook.

Formspree’s developer surface includes authentication, documentation, pricing, GitHub presence, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.7/100 thin ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Forms Backend Static Sites Email Webhook JAMstack CLI

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 35.7/100 · thin

Contract Quality 14.3 / 25

Developer Ergonomics 4.3 / 20

Access Clarity 6.8 / 20

Operational Transparency 2.7 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

Agent readiness — 23/100 · agent aware

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 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/formspree: 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 →

APIs 3

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

Formspree Form Submission Endpoint

Public POST endpoint per form. Accepts standard HTML form posts and cross-origin AJAX (Accept: application/json) and returns JSON. No auth for the submission itself; per-form sp...

Formspree Forms API

REST API for retrieving submissions and managing forms. Endpoints under /api/0/forms//. Bearer auth using a public read-only API key or a Master API key (paid plans only...

Formspree Forms API

The Forms API from Formspree — 1 operation(s) for forms.

Open Collections 3

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

API Collection

OPEN COLLECTION

Formspree Form Submissions Forms API

OPEN COLLECTION

Formspree Form Submissions API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Formspree Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Formspree Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Formspree Finops

FINOPS

Security Posture 4

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

Formspree Authentication

http · 1 scheme

SECURITY

Formspree Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Formspree Vulnerability Disclosure

disclosure policy published

SECURITY

Formspree Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

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

Formspree Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: formspree
url: https://raw.githubusercontent.com/api-evangelist/formspree/refs/heads/main/apis.yml
name: Formspree
kind: company
description: 'Formspree is a form backend for static and Jamstack sites. Two API surfaces matter: (1) the public form-submission
  endpoint (formspree.io/f/{hashid}) that accepts POST submissions and returns JSON when the Accept header is set, and (2)
  the Forms API (formspree.io/api/0/...) for programmatic submission retrieval, export and form management. Plugins and the
  Formspree CLI extend the surface.'
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: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/formspree.png
tags:
- Forms
- Backend
- Static Sites
- Email
- Webhook
- JAMstack
- CLI
tags_raw:
- Forms
- Backend
- Static Sites
- Email
- Webhooks
- JAMstack
- CLI
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
apis:
- aid: formspree:submission
  name: Formspree Form Submission Endpoint
  description: 'Public POST endpoint per form. Accepts standard HTML form posts and cross-origin AJAX (Accept: application/json)
    and returns JSON. No auth for the submission itself; per-form spam controls.'
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
  baseURL: https://formspree.io/f/<hashid>
  tags:
  - REST
  - Submissions
  - AJAX
  properties:
  - type: Documentation
    url: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
- aid: formspree:forms-api
  name: Formspree Forms API
  description: REST API for retrieving submissions and managing forms. Endpoints under /api/0/forms/<hashid>/. Bearer auth
    using a public read-only API key or a Master API key (paid plans only). Supports since/limit/offset.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://help.formspree.io/sections/the-forms-api/
  baseURL: https://formspree.io/api/0
  tags:
  - REST
  - Submissions
  - Management
  - Pagination
  properties:
  - type: Documentation
    url: https://help.formspree.io/sections/the-forms-api/
  - type: APIKeys
    url: https://help.formspree.io/articles/the-forms-api/api-keys/
- aid: formspree:formspree-forms-api
  name: Formspree Forms API
  description: The Forms API from Formspree — 1 operation(s) for forms.
  humanURL: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
  baseURL: https://formspree.io/f/<hashid>
  tags:
  - Forms
  properties:
  - type: OpenAPI
    url: openapi/formspree-forms-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/formspree-agentic-access.yml
- type: TrustCenter
  url: security/formspree-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/formspree-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/formspree-domain-security.yml
- type: Authentication
  url: authentication/formspree-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/formspree
- type: Website
  url: https://formspree.io/
- type: Documentation
  url: https://help.formspree.io/
- type: Pricing
  url: https://formspree.io/plans
- type: GitHub
  url: https://github.com/formspree
- type: StatusPage
  url: https://www.formspreestatus.com/
- type: Plans
  url: plans/formspree-plans-pricing.yml
- type: RateLimits
  url: rate-limits/formspree-rate-limits.yml
- type: FinOps
  url: finops/formspree-finops.yml
- type: LlmsText
  url: https://formspree.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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