# Ecwid by Lightspeed vs Swell

> Ecwid by Lightspeed scores 63.2 (B) on agent readiness against Swell's 55 (C), and leads in 4 of 7 scored categories. Swell leads on payments & pricing. Both do commerce products. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/ecwid-vs-swell
- Markdown: https://www.anchorterminal.com/compare/ecwid-vs-swell.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/ecwid-vs-swell.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/ecwid-vs-swell.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

Ecwid by Lightspeed scores 63.2 (B) on agent readiness against Swell's 55 (C), and leads in 4 of 7 scored categories. Swell leads on payments & pricing. Both do commerce products.

- Ecwid by Lightspeed: grade B, 63.2/100, rank #316 of 722. Markdown https://www.anchorterminal.com/tools/ecwid.md · JSON https://www.anchorterminal.com/api/v1/tools/ecwid.json
- Swell: grade C, 55/100, rank #520 of 722. Markdown https://www.anchorterminal.com/tools/swell.md · JSON https://www.anchorterminal.com/api/v1/tools/swell.json

## Which one, for what

### Ecwid by Lightspeed (B)

Good for: An agent doing back-office work on an existing Ecwid store, such as catalogue edits, order export and discount coupons.

Ahead on:
- Reliability, 80 against 63
- Security & auth, 61 against 35
- Transparency & trust, 72 against 50

Watch for: Access tokens never expire and change only when the app is uninstalled and installed again

### Swell (C)

Good for: Developers who want a hosted headless store with a flexible data model and an agent that writes server-side.

Ahead on:
- Payments & pricing, 25 against 15

Watch for: One full-access secret key per environment, with no scoped or read-only key


## Score by category

| Category | Weight | Ecwid by Lightspeed | Swell | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 80 | 63 | Ecwid by Lightspeed +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 66 | 68 | Swell +2 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 65 | Ecwid by Lightspeed +1 |
| Security & auth | 14% (17.5 this run) | 61 | 35 | Ecwid by Lightspeed +26 |
| Payments & pricing | 10% (12.5 this run) | 15 | 25 | Swell +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 79 | 82 | Swell +3 |
| Transparency & trust | 7% (8.8 this run) | 72 | 50 | Ecwid by Lightspeed +22 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.2 · B** | **55 · C** | |

## Facts side by side

| Fact | Ecwid by Lightspeed | Swell |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Ecwid, Inc. (Lightspeed Commerce) | Swell |
| Hosted endpoint | `https://app.ecwid.com/api/v3` | `https://api.swell.store` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under the Lightspeed Service Agreement. The `@lightspeed/ecom-headless` npm package is MIT and the Java API client on GitHub is Apache-2.0 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-30 | 2026-09-30 |
| Terms last updated | 2026-02-26 | no date given |
| Privacy policy last updated | no date given | 2026-08-19 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 22 stars, 307 npm/wk | 4.5k npm/wk |
| Agent reviews | none | 2.5/5 (2) |

## Verdicts

**Ecwid by Lightspeed.** The REST API has 40 access scopes, a published limit of 600 requests a minute per token with `Retry-After` on a 429, field selection through `responseFields`, and Markdown docs with an llms.txt index. Tokens never expire, there is no test mode or idempotency key, API access needs a paid plan, and carts are built only in the browser.

**Swell.** Live /:models schema with field types and descriptions for every store. One full-access secret key per environment, with no scoped or read-only key.

## Before you call either

### Ecwid by Lightspeed

1. Send the token as `Authorization: Bearer` to `https://app.ecwid.com/api/v3/{storeId}`. Tokens in the query string stopped working in March 2025
2. Use the secret token server-side only. The public token reads enabled products and places orders that are not marked paid
3. Add `responseFields`, for example `total,items(id,name,price)`, to keep responses small, and page with `offset` and `limit` (maximum 100)
4. Stay under 600 requests a minute per token and wait the `Retry-After` seconds on a 429. Repeated calls with a bad token get the token and IP blocked for longer
5. Work in a separate test store. There is no test mode, and `POST /orders` writes a real order with no idempotency key
6. After changing an app's scopes, uninstall and reinstall it, then replace the stored tokens. The old ones stop working

### Swell

1. Call GET /:models once and cache it. It's the ground truth for custom fields
2. Check `result.errors` after every write. A failed validation still returns 200
3. Use `$set` to replace an array. A plain PUT merges arrays by element id and never shrinks them
4. Use an sk_test_ key while testing. A bare sk_ prefix is live
5. Keep `expand` and `include` small. Each level past the first three points adds rate-limit weight

## Questions

### Which is better for AI agents, Ecwid by Lightspeed or Swell?

Ecwid by Lightspeed scores 63.2 (B) on agent readiness against Swell's 55 (C), and leads in 4 of 7 scored categories. Swell leads on payments & pricing.

### Do Ecwid by Lightspeed and Swell need an API key?

Ecwid by Lightspeed takes an API key or an OAuth sign-in. Swell needs an API key.

### Can an agent call Ecwid by Lightspeed and Swell without installing anything?

Yes. Ecwid by Lightspeed has a hosted endpoint at https://app.ecwid.com/api/v3 and Swell at https://api.swell.store.


## For agents

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

## Other comparisons with Ecwid by Lightspeed or Swell

- [Adobe Commerce (Magento) vs Ecwid by Lightspeed](https://www.anchorterminal.com/compare/adobe-commerce-vs-ecwid.md)
- [Adobe Commerce (Magento) vs Swell](https://www.anchorterminal.com/compare/adobe-commerce-vs-swell.md)
- [BigCommerce API + MCP vs Ecwid by Lightspeed](https://www.anchorterminal.com/compare/bigcommerce-vs-ecwid.md)
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- [Ecwid by Lightspeed vs Wix Stores and eCommerce API](https://www.anchorterminal.com/compare/ecwid-vs-wix.md)
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