# Shippo vs ShipStation API

> Shippo scores 61.9 (C) on agent readiness against ShipStation API's 59.3 (C), and leads in 2 of 7 scored categories. ShipStation API leads on reliability. Both do shipping rates. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/shippo-vs-shipstation
- Markdown: https://www.anchorterminal.com/compare/shippo-vs-shipstation.md (~1,950 tokens)
- Slim: https://www.anchorterminal.com/compare/shippo-vs-shipstation.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/shippo-vs-shipstation.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Shippo scores 61.9 (C) on agent readiness against ShipStation API's 59.3 (C), and leads in 2 of 7 scored categories. ShipStation API leads on reliability. Both do shipping rates.

- Shippo: grade C, 61.9/100, rank #317 of 629. Markdown https://www.anchorterminal.com/tools/shippo.md · JSON https://www.anchorterminal.com/api/v1/tools/shippo.json
- ShipStation API: grade C, 59.3/100, rank #382 of 629. Markdown https://www.anchorterminal.com/tools/shipstation.md · JSON https://www.anchorterminal.com/api/v1/tools/shipstation.json

## Which one, for what

### Shippo (C)

Good for: An agent that quotes and buys parcel labels across USPS, UPS, FedEx and DHL Express for a small or mid-size shipper, with a free test mode and public unit prices.

Ahead on:
- Security & auth, 52 against 32

Watch for: No idempotency key on label purchase or other writes. Only the Reporting API accepts one

### ShipStation API (C)

Good for: An agent working inside a merchant's existing ShipStation account (orders, batches, inventory, labels), or a developer who wants a free sandbox through the ShipStation API plans.

Ahead on:
- Reliability, 64 against 59

Watch for: One API key with full account access. No scopes, read-only keys or approval step before a label is bought


## Score by category

| Category | Weight | Shippo | ShipStation API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 59 | 64 | ShipStation API +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 83 | even |
| Agent ergonomics | 13% (16.2 this run) | 64 | 64 | even |
| Security & auth | 14% (17.5 this run) | 52 | 32 | Shippo +20 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 73 | Shippo +4 |
| Transparency & trust | 7% (8.8 this run) | 61 | 64 | ShipStation API +3 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **61.9 · C** | **59.3 · C** | |

## Facts side by side

| Fact | Shippo | ShipStation API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Shippo | Auctane LLC d/b/a ShipStation |
| Hosted endpoint | `https://api.goshippo.com` | `https://api.shipstation.com/v2` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Freemium |
| Price for shipping rates | $0.01 per call | not published |
| x402 | no | no |
| Licence | Proprietary service under Shippo's terms of use. The SDKs and the goshippo/ai repository (skills and MCP bridge) are MIT | Proprietary service under ShipStation's terms of service. The v2 OpenAPI file is marked MIT and the SDKs on GitHub are Apache 2.0 |
| Tools exposed | 4 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `com.shippo/shippo-mcp` | not listed |
| Last release | 2026-10-01 | 2026-10-01 |
| Terms last updated | couldn't be read | no date given |
| Privacy policy last updated | couldn't be read | 2026-03-18 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 3 stars, 73k npm/wk, 20k PyPI/wk | 6.8k npm/wk |

## Verdicts

**Shippo.** Per-label and per-call prices are public, test keys are self-serve, and the OpenAPI spec, llms.txt and Markdown docs are open to a fetch. Label purchase has no idempotency key, API keys carry no scopes, and the status page logged carrier-side incidents on most days between July and October 2026.

**ShipStation API.** A public OpenAPI 3.1 contract with 173 operations, Markdown docs for agents and a free ShipStation API plan with a sandbox make a first rate quote or test label reachable without a contract. One API key carries full account access, with no scopes, read-only mode or idempotency keys on label purchases.

## Before you call either

### Shippo

1. Build and test with a shippo_test_ key. Test and live object IDs are separate, and the hosted MCP server has no test mode
2. Send `Authorization: ShippoToken <key>`, not Bearer, and pin `Shippo-API-Version: 2018-02-08`
3. Before retrying a failed POST /transactions, list recent transactions. There is no idempotency key, and a second purchase is a second charge
4. Pass `async: false` on shipments and transactions, or poll the object until its status leaves QUEUED
5. Set `results` on list calls (under 200). Defaults vary by resource, and list calls are limited to 50 a minute on live keys

### ShipStation API

1. Send the key in an `API-Key` header to https://api.shipstation.com/v2. A key that starts `TEST_` runs in the sandbox on the same host
2. Call GET /v2/carriers first. Rate and label calls need `carrier_ids` or a `carrier_id` and a `service_code` from that account
3. Don't blindly retry POST /v2/labels after a timeout. List labels first, then void a duplicate with PUT /v2/labels/{label_id}/void
4. Check the `errors` array on 2XX responses too, and read `error_source` to tell a carrier fault from a ShipStation one
5. On a platform (Standard or Premium) key every label is real and charged. Ask the owner before buying, and void test labels at once

## Questions

### Which is better for AI agents, Shippo or ShipStation API?

Shippo scores 61.9 (C) on agent readiness against ShipStation API's 59.3 (C), and leads in 2 of 7 scored categories. ShipStation API leads on reliability.

### Do Shippo and ShipStation API need an API key?

Shippo takes an API key or an OAuth sign-in. ShipStation API needs an API key.

### Can an agent call Shippo and ShipStation API without installing anything?

Yes. Shippo has a hosted endpoint at https://api.goshippo.com and ShipStation API at https://api.shipstation.com/v2.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/shippo-vs-shipstation.json, and with the fewest tokens: https://www.anchorterminal.com/compare/shippo-vs-shipstation.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "shippo", "b": "shipstation"}`. From a terminal: `anchor compare shippo shipstation`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/shippo.json and https://www.anchorterminal.com/api/v1/tools/shipstation.json

## Other comparisons with Shippo or ShipStation API

- [EasyPost vs Shippo](https://www.anchorterminal.com/compare/easypost-vs-shippo.md)
- [EasyPost vs ShipStation API](https://www.anchorterminal.com/compare/easypost-vs-shipstation.md)
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