Jupiter Signup

Jupiter Signup, built by PerfSpot LLC, offers an AI‑driven signup form service. Users describe their event, class, or fundraiser in plain language and the platform generates a complete registration page with payment integration (Stripe, Venmo, Zelle, etc.). It supports free RSVPs, paid classes, camps, workshops, and custom add‑ons, handling discounts, waitlists, and deadlines. The service is free to start with a 1% card processing fee, no monthly subscription, and provides developer documentation for API and MCP integration.

Jupiter Signup is profiled on the APIs.io network. Tagged areas include Software-as-a-Service, Forms, Event Management, Payments, and Artificial Intelligence.

Jupiter Signup’s developer surface includes documentation, pricing, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

17.3/100 emerging Agent 4/100 human only Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumApproval

0 APIs

Software-as-a-Service Forms Event Management Payments Artificial Intelligence

Kin Score

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

Composite quality — 17.3/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 9.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.0 / 15

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 5 / 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 Payments 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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<a href="https://apis.io/providers/jupitersignup-com/"><img src="https://apis.io/badge/jupitersignup-com/card.svg" alt="Jupiter Signup on APIs.io — Kin Score by API Evangelist"></a>

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
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 →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) 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 →
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 →

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 19.0 — up to +16.2 composite points Ask about this →
Operational Transparency scores 0.0 — up to +13.0 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/jupitersignup-com/apis.yml: open an issue on github.com/api-evangelist/jupitersignup-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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Jupiter Signup API pricing

Prices published by Jupiter Signup, read 2026-11-13 from jupitersignup.com/pricing.

Plan	Price
Free	$0 no monthly fee required
Pro	$10/ month, or $100/ year

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Jupiter Signup Plans Pricing

2 plans

PLANS

Security Posture 1

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

Jupiter Signup Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

About

About

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: jupitersignup-com
name: Jupiter Signup
accessModel:
  pricing: freemium
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Freemium · Requires approval
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://jupitersignup.com/static/og-default.png
description: Jupiter Signup, built by PerfSpot LLC, offers an AI‑driven signup form service. Users describe their event, class,
  or fundraiser in plain language and the platform generates a complete registration page with payment integration (Stripe,
  Venmo, Zelle, etc.). It supports free RSVPs, paid classes, camps, workshops, and custom add‑ons, handling discounts, waitlists,
  and deadlines. The service is free to start with a 1% card processing fee, no monthly subscription, and provides developer
  documentation for API and MCP integration.
url: https://artifacts.apis.io/jupitersignup-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-13 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-13'
modified: '2026-11-13'
tags:
- Software-as-a-Service
- Forms
- Event Management
- Payments
- Artificial Intelligence
tags_raw:
- SaaS
- Forms
- Event Management
- Payments
- AI
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/jupitersignup-com-plans-pricing.yml
- type: LLMsTxt
  url: llms/jupitersignup-com-llms.txt
- type: WellKnown
  url: well-known/jupitersignup-com-well-known.yml
- type: Hosts
  url: hosts/jupitersignup-com-hosts.yml
- type: Vendors
  url: vendors/jupitersignup-com-vendors.yml
- type: Login
  url: https://jupitersignup.com/login
- type: DomainSecurity
  url: security/jupitersignup-com-domain-security.yml
- type: Website
  url: https://jupitersignup.com/
- type: DeveloperPortal
  url: https://jupitersignup.com/developers
- type: Documentation
  url: https://jupitersignup.com/developers
- type: Pricing
  url: https://jupitersignup.com/pricing
- type: TermsOfService
  url: https://jupitersignup.com/terms
- type: PrivacyPolicy
  url: https://jupitersignup.com/privacy
- type: About
  url: https://jupitersignup.com/about
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Developer docs list REST endpoints but no OpenAPI or other machine‑readable contract is provided.
  evidence:
  - url: https://jupitersignup.com/developers
    status: 200
  checked: '2026-11-13'
x-enrichment:
  date: '2026-11-13'
  status: enriched
  artifacts_added: 12
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Jupiter Signup API — frequently asked questions

How much does the Jupiter Signup API cost?

Jupiter Signup publishes its prices; its Free plan is $0 no monthly fee required as of 2026-11-13. APIs.io lists 2 pricing plans for Jupiter Signup, with each plan's price, limits and inclusions under Pricing on this page.

Is the Jupiter Signup API ready for AI agents?

Jupiter Signup has a Kin Score of 17.3 out of 100 (emerging) and an Agent Readiness score of 3.6 (human-only), scored by API Evangelist on 2026-11-13.

Work with this as data

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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/jupitersignup-com"

All providers

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

Every operation they expose

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

How their score was established

curl "https://apis.io/api/v1/providers/jupitersignup-com/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.

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