# Stamps.com

**Canonical:** https://apis.io/providers/stamps-com/  
**Website:** https://www.stamps.com  
**APIs profiled:** 7

Stamps.com provides online postage and shipping services, enabling businesses and individuals to print postage, compare rates, and manage shipments directly from their computers. The platform integrates with major e‑commerce solutions, offers API access for automating label creation, tracking, and address verification, and supports bulk mailing, international shipping, and customs documentation. As a leading provider in the mailing industry, Stamps.com continuously expands its features to simplify logistics and reduce shipping costs for its customers.

## Kin Score — 26.4 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-10.7 from 37.1).

| Facet | Score |
|---|---|
| Discoverability | 70.5 |
| Contract Quality | 24.5 |
| Contract Governance | 22.0 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 22.6 |
| Access Clarity | 22.4 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 14.7 (matched via fallback).

## Agent readiness — 16.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (7)

- **Stamps.com Shipping API** — REST and SOAP APIs for USPS shipping services, including rates, label creation, tracking, and address verification.
- **Stamps.com Account API** — The Account API from Stamps.com — 2 operation(s) for account.
- **Stamps.com Addresses API** — The Addresses API from Stamps.com — 1 operation(s) for addresses.
- **Stamps.com Balance API** — The Balance API from Stamps.com — 1 operation(s) for balance.
- **Stamps.com Labels API** — The Labels API from Stamps.com — 1 operation(s) for labels.
- **Stamps.com Stamps.com API** — The Stamps.com API API from Stamps.com — 1 operation(s) for stamps.com api.
- **Stamps.com Tracking API** — The Tracking API from Stamps.com — 1 operation(s) for tracking.

## Security (1)

- **Stamps Com Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Shipping, E-Commerce, Logistics

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