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 3 API contracts indexed on the APIs.io network, including Forms API, and 2 more. Tagged areas include Forms, Backend, Static Sites, Email, and Webhook.

The Formspree catalog on APIs.io includes 1 Spectral governance ruleset.

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

🌐 Visit website 📡 Profile data on GitHub

38.6/100 thin ▬ flat Agent 21/100 agent aware Front door AI 4/6 moderate Heartbeat 95/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Forms Backend Static Sites Email Webhook JAMstack CLI

Kin Score

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

Composite quality — 38.6/100 · thin

Contract Quality 10.9 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 5.8 / 17

Operational Transparency 3.5 / 11

Contract Governance 1.4 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 21/100 · 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

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 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.

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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/formspree/"><img src="https://apis.io/badge/formspree/card.svg" alt="Formspree on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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
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
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 23.8 — up to +15.2 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Contract Quality scores 51.4 — up to +12.2 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/formspree/apis.yml: open an issue on github.com/api-evangelist/formspree 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	51.7	-	-
Jamstack Hosting Integrations (Vercel Marketplace and Netlify Integrations publishers)	builds-on	51.7	-	-

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 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 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). Suppo...

Formspree Forms API

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

Open Collections 2

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

Formspree Form Submissions Forms API

OPEN COLLECTION

Formspree Form Submissions API

OPEN COLLECTION

Formspree API pricing

Not yet checked against Formspree's own pricing page. Compiled by API Evangelist on 2026-05-08 from formspree.io/plans; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free free	Free
Personal subscription	—
Professional subscription	—
Business subscription	—

Plan details, limits and sources →

Rate limits

Free plan submissions/month: 50 submissions/month
Free plan archive retention: 30 days
Forms API requests: see Formspree docs requests

Compiled by API Evangelist, not yet checked against Formspree's documentation. Rate-limit details →

Billed by: plan-month · FinOps profile →

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

Service Levels 1

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

Formspree

SLA

FinOps 1

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

Formspree Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Formspree API Rules

54 rules · 52 errors 1 warnings 1 info

SPECTRAL

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

no policy recorded

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 4

The organization behind the API

Blog

Blog

BlogRSS

BlogRSS

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
  gated: none
  gated_source:
  - onboarding
  label: Freemium · 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/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: '2026-10-06'
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:
- url: https://formspree.io/blog/
  type: Blog
- url: https://formspree.io/blog/index.xml
  type: BlogRSS
- 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

Formspree API — frequently asked questions

Does Formspree have an API?

Yes. APIs.io lists 3 APIs from Formspree, including Formspree Form Submission Endpoint, Formspree Forms API and Formspree Forms API.

Is there an OpenAPI specification for the Formspree API?

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

How do I authenticate with the Formspree API?

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

How much does the Formspree API cost?

APIs.io lists 4 pricing plans for Formspree, with each plan's price, limits and inclusions under Pricing on this page.

Is the Formspree API ready for AI agents?

Formspree has a Kin Score of 38.6 out of 100 (thin) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/formspree"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/formspree/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/formspree/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.