FSBO.com

FSBO.com is a technology platform that enables homeowners to sell their homes directly without a real‑estate agent. The service provides free listings, optional paid plans with premium tools, MLS syndication, and support resources such as a Learning Center, blog, and FAQ. By eliminating commissions, FSBO.com helps sellers keep more equity while offering step‑by‑step guidance, pricing calculators, and legal paperwork assistance across all 50 U.S. states.

FSBO.com is profiled on the APIs.io network. Tagged areas include RealEstate, Marketplace, SaaS, HomeSelling, and FSBO.

FSBO.com’s developer surface includes documentation, support, engineering blog, pricing, signup flow, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

17.1/100 emerging Agent 5/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs 1 MCP Servers

RealEstateMarketplaceSaaSHomeSellingFSBO

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 17.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 7.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.1 / 15

Agent readiness — 5/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 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
Developer Ergonomics scores 16.7 — up to +16.7 composite points
Operational Transparency scores 0.0 — up to +13.0 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/fsbo-com/apis.yml: open an issue on github.com/api-evangelist/fsbo-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 →

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

FSBO.com MCP Server

Remote MCP server at api.fsbo.com.

MCP SERVER

Security Posture 1

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

Fsbo Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Access & Security 1

Authentication, authorization, and security posture

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 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: fsbo-com
name: FSBO.com
description: FSBO.com is a technology platform that enables homeowners to sell their homes directly without a real‑estate
  agent. The service provides free listings, optional paid plans with premium tools, MLS syndication, and support resources
  such as a Learning Center, blog, and FAQ. By eliminating commissions, FSBO.com helps sellers keep more equity while offering
  step‑by‑step guidance, pricing calculators, and legal paperwork assistance across all 50 U.S. states.
url: https://artifacts.apis.io/fsbo-com/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- RealEstate
- Marketplace
- SaaS
- HomeSelling
- FSBO
image: https://fsbo.com/images/fsbo-gold-black.png
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/fsbo-com-llms.txt
- type: MCPServer
  url: mcp/fsbo-com-mcp.yml
- type: WellKnown
  url: well-known/fsbo-com-well-known.yml
- type: Hosts
  url: hosts/fsbo-com-hosts.yml
- type: Newsroom
  url: https://fsbo.com/press
- type: DomainSecurity
  url: security/fsbo-com-domain-security.yml
- type: Website
  url: https://fsbo.com/
- type: Documentation
  url: https://fsbo.com/learn
- type: Support
  url: https://fsbo.com/help
- type: Blog
  url: https://fsbo.com/blog
- type: Pricing
  url: https://fsbo.com/packages
- type: SignUp
  url: https://fsbo.com/register
- type: TermsOfService
  url: https://fsbo.com/terms
- type: PrivacyPolicy
  url: https://fsbo.com/privacy
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: All attempted OpenAPI spec URLs on fsbo.com, support.fsbo.com, and api.fsbo.com returned 404 or 403, and no documentation
    host was identified.
  evidence:
  - url: https://fsbo.com/openapi.json
    status: 404
  checked: '2026-10-28'
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

FSBO.com API — frequently asked questions

Does FSBO.com have an MCP server?

Yes. APIs.io lists 1 MCP server for FSBO.com: Remote MCP server at api.fsbo.com.

Is the FSBO.com API ready for AI agents?

FSBO.com has a Kin Score of 17.1 out of 100 (emerging) and an Agent Readiness score of 4.5 (human-only), scored by API Evangelist on 2026-10-31.

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