# Handwrite IO

**Canonical:** https://apis.io/providers/handwrite-io/  
**Website:** https://handwrite.io/  
**APIs profiled:** 4

Handwrite is a South Carolina based direct-mail service that writes and mails real handwritten cards on demand, and exposes that fulfillment as a small REST API at https://api.handwrite.io/v1. Four operations cover the whole surface: list the handwriting styles on the account, list the stationery and card options, send a card to between one and ten US recipients (or up to 1,000 orders in a single batch request), and fetch an order to follow it from processing through written to complete and retrieve proof images of the finished card and envelope. Authentication is a single static API key sent raw in the Authorization header, prefixed test_hw for unbilled test-mode calls or live_hw for calls that actually mail and bill. Pricing is per mailed card rather than per API call, from $2.99 down to $2.45 by volume, with the card, envelope, handwriting and postage included. The API is rate limited to 60 requests per minute per key. Handwrite also ships a Zapier integration for teams that do not want to write code.

## Kin Score — 56.0 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 56.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 57.3 |
| Governance | 45.5 |
| Contract Governance | 45.5 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 66.1 |
| Commercial Clarity | 63.2 |
| Access Clarity | 63.2 |

Regulatory layer — **Payments**: 26.6 (matched via tags).

## Agent readiness — 33.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Paid per card · Self-serve signup · Unbilled test mode — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (4)

- **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

## Agentic access (1)

- **Handwrite Io Agentic Access** — 4 operations · 1 acting

## Security (2)

- **Handwrite Io Authentication** — apiKey · 1 scheme
- **Handwrite Io Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Handwrite Io Plans Pricing**

## Tags

Direct Mail, Handwritten, Handwritten Notes, Cards, Marketing, Notes, Print, Fulfillment, Customer Engagement

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/handwrite-io/). Scores are computed from the provider's own public artifacts under a published rubric.