Handoff

Handoff is an AI-native construction management and estimating platform built for residential contractors — remodelers, home builders, handymen, and trade contractors. It handles estimating, AI takeoffs, proposals, project management, scheduling, CRM, change orders, invoicing, and financial management end-to-end, generating detailed, localized estimates in seconds from descriptions, photos, drawings, or voice. Built by 1build and backed by Initialized Capital, Greycroft, Y Combinator, and Masco Ventures, Handoff serves 10,000+ monthly active users managing billions in annualized residential construction projects. Handoff does not currently expose a public developer API; it offers a Zapier integration for connected workflows, with an API on its public roadmap.

Handoff is profiled on the APIs.io network. Tagged areas include Company, Construction, Construction Management, Estimating, and Takeoffs.

Handoff’s developer surface includes pricing, signup flow, support, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

21.2/100 emerging ▬ flat Agent 0/100 human only Front door AI 6/6 dominant Heartbeat 91/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

0 APIs

Company Construction Construction Management EstimatingTakeoffsContractors Artificial Intelligence Project Management CRM Field Service Management

Kin Score

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

Composite quality — 21.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 11.8 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.7 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 0/100 · 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 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 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
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 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 7.1 — up to +18.6 composite points
Operational Transparency scores 5.3 — up to +12.3 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/handoff/apis.yml: open an issue on github.com/api-evangelist/handoff 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 →

Handoff API pricing

Prices published by Handoff, read 2026-10-07 from www.handoff.ai/pricing.

Plan	Price
Flex	$119 per month, billed annually Includes: 50 AI usage credits p/mo, 1 custom pricing catalog, AI-generated proposals, Voice Transcription To E
Pro	$239 per month, billed annually Includes: All Flex features plus unlimited AI usage credits, unlimited custom pricing catalogs, client financi
Scale	$719 per month, billed annually Includes: All Pro features plus AI Takeoffs up to 7,000 sqft, API and MCP Access, AI Subcontractor Portal; 12-
Supplier Platform	Contact us for pricing Includes: AI takeoffs on contractors' plans, priced with your SKUs, delivered into your ERP, uptime SLA

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Handoff Plans Pricing

4 plans

PLANS

Security Posture 1

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

Handoff Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

Roadmap

Roadmap

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: handoff
name: Handoff
description: Handoff is an AI-native construction management and estimating platform built for residential contractors — remodelers,
  home builders, handymen, and trade contractors. It handles estimating, AI takeoffs, proposals, project management, scheduling,
  CRM, change orders, invoicing, and financial management end-to-end, generating detailed, localized estimates in seconds
  from descriptions, photos, drawings, or voice. Built by 1build and backed by Initialized Capital, Greycroft, Y Combinator,
  and Masco Ventures, Handoff serves 10,000+ monthly active users managing billions in annualized residential construction
  projects. Handoff does not currently expose a public developer API; it offers a Zapier integration for connected workflows,
  with an API on its public roadmap.
url: https://raw.githubusercontent.com/api-evangelist/handoff/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- initialized-capital
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
image: https://www.handoff.ai/favicon.ico
tags:
- Company
- Construction
- Construction Management
- Estimating
- Takeoffs
- Contractors
- Artificial Intelligence
- Project Management
- CRM
- Field Service Management
tags_raw:
- Company
- Construction
- Construction Management
- Estimating
- Takeoffs
- Contractors
- Artificial Intelligence
- Project Management
- CRM
- Field Service
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/handoff-plans-pricing.yml
- type: Website
  url: https://handoff.ai/
- type: Pricing
  url: https://www.handoff.ai/pricing
- type: SignUp
  url: https://app.handoff.ai/sign-up/
- type: Login
  url: https://app.handoff.ai/login/
- type: Support
  url: https://help.handoff.ai
- type: Blog
  url: https://www.handoff.ai/blog
- type: Roadmap
  url: https://handoff.featurebase.app/roadmap
- type: TermsOfService
  url: https://www.handoff.ai/terms-of-use
- type: PrivacyPolicy
  url: https://www.handoff.ai/privacy-policy
- type: LLMsTxt
  url: llms/handoff-llms.txt
- type: DomainSecurity
  url: security/handoff-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Handoff API — frequently asked questions

How much does the Handoff API cost?

Handoff publishes its prices; its Flex plan is $119 per month, billed annually as of 2026-10-07. APIs.io lists 4 pricing plans for Handoff, with each plan's price, limits and inclusions under Pricing on this page.

Is the Handoff API ready for AI agents?

Handoff has a Kin Score of 21.2 out of 100 (emerging) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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