Handwrite IO website screenshot

Handwrite IO

Handwrite IO provides a REST API that lets you send handwritten notes in an automated manner. Using the API, businesses can send personalized handwritten cards and notes at scale through REST endpoints.

Handwrite IO publishes 4 APIs on the APIs.io network, including Handwriting API, Orders API, Send API, and 1 more. Tagged areas include Direct Mail, Handwritten, Marketing, and Notes.

The Handwrite IO catalog on APIs.io includes 1 Spectral governance ruleset.

Handwrite IO’s developer surface includes authentication, documentation, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.7/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
4 APIs
Direct MailHandwrittenMarketingNotes

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 38.7/100 · thin
Contract Quality 15.1 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 1.2 / 12
Discoverability 6.5 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 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 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/handwrite-io: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

Handwrite IO Handwriting API

Available handwriting styles

Handwrite IO Orders API

Order tracking and status

Handwrite IO Send API

Send handwritten notes

Handwrite IO Stationery API

Available stationery and cards

Open Collections 1

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

Handwrite IO API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Handwrite Io Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Handwrite Io Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Handwrite Io Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Handwrite IO API Rules

0 rules ·

SPECTRAL

Security Posture 2

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

Handwrite Io Authentication

apiKey · 1 scheme

SECURITY

Handwrite Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Handwrite Io Agentic Access

4 operations · 1 acting

4 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: handwrite-io
name: Handwrite IO
description: Handwrite IO provides a REST API that lets you send handwritten notes in an automated manner. Using the API,
  businesses can send personalized handwritten cards and notes at scale through REST endpoints.
url: https://raw.githubusercontent.com/api-evangelist/handwrite-io/refs/heads/main/apis.yml
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/handwrite-io.png
tags:
- Direct Mail
- Handwritten
- Marketing
- Notes
created: '2024-11-14'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: handwrite-io:handwrite-io-handwriting-api
  name: Handwrite IO Handwriting API
  description: Available handwriting styles
  humanURL: https://documentation.handwrite.io/#introduction
  baseURL: https://api.handwrite.io/v1
  tags:
  - Handwriting
  properties:
  - type: OpenAPI
    url: openapi/handwrite-io-handwriting-api-openapi.yml
  - type: Documentation
    url: https://documentation.handwrite.io/#introduction
  - type: Authentication
    url: https://documentation.handwrite.io/#authentication
  - type: Rules
    url: https://raw.githubusercontent.com/api-evangelist/handwrite-io/refs/heads/main/rules/handwrite-io-rules.yml
- aid: handwrite-io:handwrite-io-orders-api
  name: Handwrite IO Orders API
  description: Order tracking and status
  humanURL: https://documentation.handwrite.io/#introduction
  baseURL: https://api.handwrite.io/v1
  tags:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/handwrite-io-orders-api-openapi.yml
  - type: Documentation
    url: https://documentation.handwrite.io/#introduction
  - type: Authentication
    url: https://documentation.handwrite.io/#authentication
  - type: Rules
    url: https://raw.githubusercontent.com/api-evangelist/handwrite-io/refs/heads/main/rules/handwrite-io-rules.yml
- aid: handwrite-io:handwrite-io-send-api
  name: Handwrite IO Send API
  description: Send handwritten notes
  humanURL: https://documentation.handwrite.io/#introduction
  baseURL: https://api.handwrite.io/v1
  tags:
  - Send
  properties:
  - type: OpenAPI
    url: openapi/handwrite-io-send-api-openapi.yml
  - type: Documentation
    url: https://documentation.handwrite.io/#introduction
  - type: Authentication
    url: https://documentation.handwrite.io/#authentication
  - type: Rules
    url: https://raw.githubusercontent.com/api-evangelist/handwrite-io/refs/heads/main/rules/handwrite-io-rules.yml
- aid: handwrite-io:handwrite-io-stationery-api
  name: Handwrite IO Stationery API
  description: Available stationery and cards
  humanURL: https://documentation.handwrite.io/#introduction
  baseURL: https://api.handwrite.io/v1
  tags:
  - Stationery
  properties:
  - type: OpenAPI
    url: openapi/handwrite-io-stationery-api-openapi.yml
  - type: Documentation
    url: https://documentation.handwrite.io/#introduction
  - type: Authentication
    url: https://documentation.handwrite.io/#authentication
  - type: Rules
    url: https://raw.githubusercontent.com/api-evangelist/handwrite-io/refs/heads/main/rules/handwrite-io-rules.yml
common:
- type: AgenticAccess
  url: agentic-access/handwrite-io-agentic-access.yml
- type: DomainSecurity
  url: security/handwrite-io-domain-security.yml
- type: Authentication
  url: authentication/handwrite-io-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/handwrite
- type: Website
  url: https://handwrite.io/
- type: Documentation
  url: https://documentation.handwrite.io/
- type: Integrations
  url: https://www.handwrite.io/integrations
integrations:
- name: Handwrite
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com