HitchPin

HitchPin is an online marketplace for the agriculture and rural economy, connecting farmers, ranchers, and rural businesses to buy and sell hay and forage, grain, cattle and livestock, farm and ranch equipment, trailers, land, and custom agricultural services. Sellers operate branded storefronts, send instant invoices, and collect payment, while buyers browse and purchase listings across the United States. HitchPin publishes public OpenAPI 3.1 definitions for its marketplace and instant-invoicing service, a receipt-rendering service, and a URL-shortcode service on GitHub. The company is backed by Foundry Group.

HitchPin publishes 3 API contracts indexed on the APIs.io network: Instant Invoice Share API, Instant Invoices API, and Rendering API. Tagged areas include Company, Marketplace, Agriculture, Livestock, and Hay and Forage.

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

HitchPin’s developer surface includes engineering blog, documentation, getting-started guide, pricing, signup flow, support, authentication, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.7/100 thin ▬ flat Agent 25/100 agent aware Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

3 published contracts 1 Agent Skills

Company Marketplace Agriculture LivestockHay and ForageFarm Equipment Invoicing Payments Rural

What this lets a business do 1

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

Financial Management

BC-200

instant-invoice-shareinstant-invoices

POST /instant-invoices/ DELETE /instant-invoices/{invoice_number}/revoke/ POST /instant-invoice-share/{share_hash}/pay/ GET /instant-invoice-share/{share_hash}/receipt/

Kin Score

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

Composite quality — 28.7/100 · thin

Contract Quality 8.9 / 19

Developer Ergonomics 4.9 / 15

Access Clarity 1.0 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.9 / 8

Regulatory Posture 2.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · 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 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 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 0 / 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 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/.

Show this score on your site.

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

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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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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)

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 6.6 — up to +18.7 composite points
Developer Ergonomics scores 32.7 — up to +13.5 composite points
Contract Quality scores 47.4 — up to +13.2 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/hitchpin/apis.yml: open an issue on github.com/api-evangelist/hitchpin 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 3

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

HitchPin Instant Invoice Share API

Invoices shared with a buyer.

HitchPin Instant Invoices API

Invoices created by a seller.

HitchPin Rendering API

The rendering API from HitchPin — 3 operation(s) for rendering.

Open Collections 3

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

Django instant-invoice-share API

OPEN COLLECTION

Django instant-invoice-share instant-invoices API

OPEN COLLECTION

Django instant-invoice-share rendering API

OPEN COLLECTION

Agent Skills 1

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

Create, share, and collect on a HitchPin instant invoice

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

HitchPin API Rules

44 rules · 38 errors 3 warnings 3 info

SPECTRAL

OpenAPI Overlays 3

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Hitchpin Django Api Overlay

2 actions · update · hitchpin-django-api-openapi.json

DERIVED

Hitchpin Receipt Rendering Overlay

1 action · update · hitchpin-receipt-rendering-openapi.json

DERIVED

Hitchpin Url Shortener Overlay

1 action · update · hitchpin-url-shortener-openapi.json

DERIVED

JSON Schema 2

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

Hitchpin Cloudevents.Schema

10 properties

JSON SCHEMA

Hitchpin Problem Details.Schema

7 properties

JSON SCHEMA

Security Posture 2

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

Hitchpin Authentication

apiKey · 2 schemes

SECURITY

Hitchpin Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Hitchpin Agentic Access

11 operations · 7 acting · 1 human-in-the-loop

11 operations · 7 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

JSONSchema

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: hitchpin
name: HitchPin
description: HitchPin is an online marketplace for the agriculture and rural economy, connecting farmers, ranchers, and rural
  businesses to buy and sell hay and forage, grain, cattle and livestock, farm and ranch equipment, trailers, land, and custom
  agricultural services. Sellers operate branded storefronts, send instant invoices, and collect payment, while buyers browse
  and purchase listings across the United States. HitchPin publishes public OpenAPI 3.1 definitions for its marketplace and
  instant-invoicing service, a receipt-rendering service, and a URL-shortcode service on GitHub. The company is backed by
  Foundry Group.
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://avatars.githubusercontent.com/u/38983146?v=4
url: https://raw.githubusercontent.com/api-evangelist/hitchpin/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- foundry-group
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Marketplace
- Agriculture
- Livestock
- Hay and Forage
- Farm Equipment
- Invoicing
- Payments
- Rural
apis:
- aid: hitchpin:hitchpin-instant-invoice-share-api
  name: HitchPin Instant Invoice Share API
  description: Invoices shared with a buyer.
  humanURL: https://github.com/HitchPin/hp-apis
  baseURL: https://apiv2.hitchpin.com
  tags:
  - instant-invoice-share
  properties:
  - type: OpenAPI
    url: openapi/hitchpin-instant-invoice-share-api-openapi.yml
- aid: hitchpin:hitchpin-instant-invoices-api
  name: HitchPin Instant Invoices API
  description: Invoices created by a seller.
  humanURL: https://github.com/HitchPin/hp-apis
  baseURL: https://apiv2.hitchpin.com
  tags:
  - instant-invoices
  properties:
  - type: OpenAPI
    url: openapi/hitchpin-instant-invoices-api-openapi.yml
- aid: hitchpin:hitchpin-rendering-api
  name: HitchPin Rendering API
  description: The rendering API from HitchPin — 3 operation(s) for rendering.
  humanURL: https://github.com/HitchPin/hp-apis
  baseURL: https://apiv2.hitchpin.com
  tags:
  - Rendering
  tags_raw:
  - rendering
  properties:
  - type: OpenAPI
    url: openapi/hitchpin-rendering-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.hitchpin.com/news/
  type: Blog
- type: CapabilityMap
  url: capabilities/hitchpin-capability-edges.yml
  name: HitchPin Business Capability Map
- type: Overlay
  url: overlays/hitchpin-django-api-overlay.yaml
- type: Website
  url: https://www.hitchpin.com
- type: GitHubOrganization
  url: https://github.com/HitchPin
- type: Documentation
  url: https://github.com/HitchPin/public-docs
- type: GettingStarted
  url: https://www.hitchpin.com/how-it-works
- type: Pricing
  url: https://www.hitchpin.com/pricing
- type: SignUp
  url: https://www.hitchpin.com/accounts/register
- type: Login
  url: https://www.hitchpin.com/accounts/login
- type: Support
  url: https://www.hitchpin.com/company/contact
- type: TermsOfService
  url: https://www.hitchpin.com/legal
- type: PrivacyPolicy
  url: https://www.hitchpin.com/legal
- type: Authentication
  url: authentication/hitchpin-authentication.yml
- type: AgenticAccess
  url: agentic-access/hitchpin-agentic-access.yml
- type: DomainSecurity
  url: security/hitchpin-domain-security.yml
- type: Conventions
  url: conventions/hitchpin-conventions.yml
- type: ErrorCatalog
  url: errors/hitchpin-problem-types.yml
- type: Conformance
  url: conformance/hitchpin-conformance.yml
- type: DataModel
  url: data-model/hitchpin-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/hitchpin-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/hitchpin-instant-invoicing.md
- type: Sandbox
  url: sandbox/hitchpin-sandbox.yml
- type: LLMsTxt
  url: llms/hitchpin-llms.txt
- type: JSONSchema
  url: json-schema/hitchpin-problem-details.schema.json
- type: JSONSchema
  url: json-schema/hitchpin-cloudevents.schema.json
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

HitchPin API — frequently asked questions

Does HitchPin have an API?

Yes. APIs.io lists 3 APIs from HitchPin, including HitchPin Instant Invoice Share API, HitchPin Instant Invoices API and HitchPin Rendering API.

Is there an OpenAPI specification for the HitchPin API?

Yes. APIs.io indexes 3 OpenAPI specifications for HitchPin, each linked for download from this page.

How do I authenticate with the HitchPin API?

HitchPin uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Hitchpin Authentication.

Is the HitchPin API ready for AI agents?

HitchPin has a Kin Score of 28.7 out of 100 (thin) and an Agent Readiness score of 25.3 (agent-aware), scored by API Evangelist on 2026-11-06.

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