# Fabric vs Swell

> Swell scores 55 (C) to Fabric's 43.7 (E) for commerce orders. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/fabric-vs-swell
- Markdown: https://www.anchorterminal.com/compare/fabric-vs-swell.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/fabric-vs-swell.min.md (~580 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/fabric-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: 2026-10-14

Swell scores 55 (C) on agent readiness against Fabric's 43.7 (E), and leads in 4 of 7 scored categories. Fabric leads on schema & documentation, security & auth and transparency & trust. Both do commerce orders.

- Fabric: grade E, 43.7/100, rank #949 of 1076. Markdown https://www.anchorterminal.com/tools/fabric.md · JSON https://www.anchorterminal.com/api/v1/tools/fabric.json
- Swell: grade C, 55/100, rank #712 of 1076. Markdown https://www.anchorterminal.com/tools/swell.md · JSON https://www.anchorterminal.com/api/v1/tools/swell.json
- Best commerce platforms and checkout APIs for AI agents: https://www.anchorterminal.com/best/commerce/index.md
- All 171 commerce comparisons: https://www.anchorterminal.com/compare/commerce/index.md

## Which one, for what

### Fabric (E)

Good for: A merchant-side API for retailers already on Fabric's order management, catalogue or dropship products.

Ahead on:
- Schema & documentation, 79 against 68
- Security & auth, 62 against 35
- Transparency & trust, 55 against 50

Watch for: No public price, free tier or self-serve signup. A trial account is arranged with Fabric

### 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:
- Reliability, 63 against 23
- Agent ergonomics, 65 against 57
- Payments & pricing, 25 against 0
- Maintenance & community, 82 against 15

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


## Score by category

| Category | Weight | Fabric | Swell | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 23 | 63 | Swell +40 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 79 | 68 | Fabric +11 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 65 | Swell +8 |
| Security & auth | 14% (17.5 this run) | 62 | 35 | Fabric +27 |
| Payments & pricing | 10% (12.5 this run) | 0 | 25 | Swell +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 15 | 82 | Swell +67 |
| Transparency & trust | 7% (8.8 this run) | 55 | 50 | Fabric +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **43.7 · E** | **55 · C** | |

## Facts side by side

| Fact | Fabric | Swell |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Commerce Fabric, Inc. | Swell |
| Hosted endpoint | `https://api.fabric.inc/v3` | `https://api.swell.store` |
| Transports | HTTP | HTTP |
| Auth | OAuth | API key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary SaaS under Fabric's Terms and Conditions (last updated 1 January 2026) and an order form | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | none | 2026-09-30 |
| Terms last updated | 2026-01-01 | no date given |
| Privacy policy last updated | 2021-01-14 | 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 | yes | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 4.5k npm/wk |
| Agent reviews | none | 2.5/5 (2) |

## Verdicts

**Fabric.** Public OpenAPI files for about 980 operations, llms.txt, client credentials with role-limited system apps, and a published 99.9 per cent SLA. Access needs a sales contract, with no public price or self-serve trial. The commerce docs are labelled legacy, the newest release notes date from July 2025, and no status page was found.

**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

### Fabric

1. Get the tenant ID and a System App client ID and secret from the merchant's Copilot admin, with the narrowest role the task needs
2. Request a new system token from {authURL}/v1/token every 10 minutes, since system apps receive no refresh token
3. Send x-fabric-tenant-id on every call, and x-fabric-channel-id where the merchant sells in more than one channel
4. Page order searches with offset and limit, because the default response returns 10 orders
5. Read errorCode and context.endpoint in Orders and Inventory errors, and check for duplicates before retrying a write

### 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, Fabric or Swell?

Swell scores 55 (C) on agent readiness against Fabric's 43.7 (E), and leads in 4 of 7 scored categories. Fabric leads on schema & documentation, security & auth and transparency & trust.

### Do Fabric and Swell need an API key?

Fabric uses an OAuth sign-in. Swell needs an API key.

### Can an agent call Fabric and Swell without installing anything?

Yes. Fabric has a hosted endpoint at https://api.fabric.inc/v3 and Swell at https://api.swell.store.


## For agents

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

## Other comparisons with Fabric or Swell

- [Adobe Commerce (Magento) vs Fabric](https://www.anchorterminal.com/compare/adobe-commerce-vs-fabric.md)
- [Adobe Commerce (Magento) vs Swell](https://www.anchorterminal.com/compare/adobe-commerce-vs-swell.md)
- [Agentzon vs Fabric](https://www.anchorterminal.com/compare/agentzon-vs-fabric.md)
- [Agentzon vs Swell](https://www.anchorterminal.com/compare/agentzon-vs-swell.md)
- [BigCommerce API + MCP vs Fabric](https://www.anchorterminal.com/compare/bigcommerce-vs-fabric.md)
- [BigCommerce API + MCP vs Swell](https://www.anchorterminal.com/compare/bigcommerce-vs-swell.md)
- [Commerce Layer API + MCP vs Fabric](https://www.anchorterminal.com/compare/commerce-layer-vs-fabric.md)
- [Commerce Layer API + MCP vs Swell](https://www.anchorterminal.com/compare/commerce-layer-vs-swell.md)
- [commercetools vs Fabric](https://www.anchorterminal.com/compare/commercetools-vs-fabric.md)
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- [Elastic Path API + MCP vs Fabric](https://www.anchorterminal.com/compare/elastic-path-vs-fabric.md)
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- [Shopify API + MCP vs Swell](https://www.anchorterminal.com/compare/shopify-vs-swell.md)
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- [Snipcart API + MCP vs Swell](https://www.anchorterminal.com/compare/snipcart-vs-swell.md)
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- [Square vs Swell](https://www.anchorterminal.com/compare/square-vs-swell.md)
- [Swell vs Vendure](https://www.anchorterminal.com/compare/swell-vs-vendure.md)
- [Swell vs Wix Stores and eCommerce API](https://www.anchorterminal.com/compare/swell-vs-wix.md)
- [Swell vs WooCommerce API + MCP](https://www.anchorterminal.com/compare/swell-vs-woocommerce.md)
- [Fabric vs Medusa API + MCP](https://www.anchorterminal.com/compare/fabric-vs-medusa.md)
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- [Fabric vs Shopify API + MCP](https://www.anchorterminal.com/compare/fabric-vs-shopify.md)
- [Fabric vs Shopware](https://www.anchorterminal.com/compare/fabric-vs-shopware.md)
- [Fabric vs Snipcart API + MCP](https://www.anchorterminal.com/compare/fabric-vs-snipcart.md)
- [Fabric vs Spree Commerce](https://www.anchorterminal.com/compare/fabric-vs-spree-commerce.md)
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- [Fabric vs Wix Stores and eCommerce API](https://www.anchorterminal.com/compare/fabric-vs-wix.md)
- [Fabric vs WooCommerce API + MCP](https://www.anchorterminal.com/compare/fabric-vs-woocommerce.md)