# Amazon Creators API vs opencommerce

> opencommerce scores 62 (B) to Amazon Creators's 48.8 (D) for product search for shoppers. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/amazon-creators-api-vs-opencommerce
- Markdown: https://www.anchorterminal.com/compare/amazon-creators-api-vs-opencommerce.md (~2,350 tokens)
- Slim: https://www.anchorterminal.com/compare/amazon-creators-api-vs-opencommerce.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/amazon-creators-api-vs-opencommerce.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-30

opencommerce scores 62 (B) on agent readiness against Amazon Creators API's 48.8 (D), and leads in 5 of 7 scored categories. Amazon Creators API leads on agent ergonomics. Both do product search for shoppers.

- Amazon Creators API: grade D, 48.8/100, rank #978 of 1239. Markdown https://www.anchorterminal.com/tools/amazon-creators-api.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-creators-api.json
- opencommerce: grade B, 62/100, rank #528 of 1239. Markdown https://www.anchorterminal.com/tools/opencommerce.md · JSON https://www.anchorterminal.com/api/v1/tools/opencommerce.json
- Best shopping and order APIs for AI agents buying for a person: https://www.anchorterminal.com/best/shopping/index.md
- All 32 shopping comparisons: https://www.anchorterminal.com/compare/shopping/index.md

## Which one, for what

### Amazon Creators API (D)

Good for: Product search, price checks and affiliate links for an agent that recommends Amazon products and hands the purchase to the person.

Ahead on:
- Agent ergonomics, 85 against 69

Watch for: No order, cart, checkout, order status or return operation

### opencommerce (B)

Good for: A company building a chat agent that buys for US shoppers at many online stores, restaurants and airlines through one tool, with payments approved by the shopper's passkey.

Ahead on:
- Schema & documentation, 81 against 50
- Security & auth, 68 against 48
- Payments & pricing, 40 against 10
- Maintenance & community, 75 against 41
- Transparency & trust, 63 against 53

Watch for: The tool description is 57 rules and about 14,500 characters, read on every call


## Score by category

| Category | Weight | Amazon Creators API | opencommerce | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 43 | Amazon Creators API +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 50 | 81 | opencommerce +31 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 69 | Amazon Creators API +16 |
| Security & auth | 14% (17.5 this run) | 48 | 68 | opencommerce +20 |
| Payments & pricing | 10% (12.5 this run) | 10 | 40 | opencommerce +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 41 | 75 | opencommerce +34 |
| Transparency & trust | 7% (8.8 this run) | 53 | 63 | opencommerce +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **48.8 · D** | **62 · B** | |

## Facts side by side

| Fact | Amazon Creators API | opencommerce |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Amazon.com Services LLC | Agentcard |
| Hosted endpoint | `https://creatorsapi.amazon/catalog/v1` | `https://api.agentcard.sh` |
| Transports | HTTP | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Free | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the Amazon Associates Program Operating Agreement and its IP Licence for each locale | Proprietary. `@agent-cards/commerce-sdk` and the `agent-cards` CLI ship a licence of Agentcard Corporation that allows running them only to use Agentcard's services and forbids copying, reverse engineering and benchmarking a competing product. The repository they name is private |
| Tools exposed | none | 1 |
| Read-only variant documented | yes | no |
| llms.txt | no | yes |
| Last release | 2026-08-21 | 2026-10-30 |
| Terms last updated | 2025-10-15 | 2026-07-10 |
| Privacy policy last updated | 2026-06-30 | 2026-10-21 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | 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 | yes | yes |
| Popularity | none | 2.7k npm/wk |

## Verdicts

**Amazon Creators API.** Read-only product search and lookup across 22 Amazon stores, with field selection, typed error reasons and documented rate limits. It cannot place or follow orders, so a person buys through the affiliate link. Access needs an accepted Associates account with 10 qualifying sales in 30 days, and the Agent Terms require agents to identify themselves.

**opencommerce.** One strictly typed buy tool covers search, cart, checkout and order updates, and every payment not covered by an auto-approval rule waits for the shopper's passkey. The tool's description runs to about 14.5 KB, the purchase API under it is undocumented, the monitoring page reports test passes rather than uptime, and the CLI says sign-ups are by invitation.

## Before you call either

### Amazon Creators API

1. Send x-marketplace as a header and marketplace and partnerTag in the body on every call
2. Cache the access token for its 3,600 seconds and share it across processes
3. Request only the resources the task needs, and use offersV2 for prices, because the older price resource is gone
4. Set the user agent to Agent/<name> as the Associates Agent Terms require
5. Hand purchases to the person through the returned detailPageURL without editing its parameters

### opencommerce

1. Call `buy` with the shopper's words in `ask`, and set `confirm` true only after the shopper says yes to the cart you showed
2. After a `timeout`, `unreachable` or `invalid_answer` error, read the conversation before sending the turn again, since the order may have gone through
3. Show the cart's `max_charge` beside its total, because the approval holds up to that amount
4. Use sandbox credentials for tests. `init` writes production credentials by default, and they place real orders
5. Check a store with `GET /buy/merchants` before sending a shopper there, and suggest another store when it is `held_back` or `supported` is false

## Questions

### Which is better for AI agents, Amazon Creators API or opencommerce?

opencommerce scores 62 (B) on agent readiness against Amazon Creators API's 48.8 (D), and leads in 5 of 7 scored categories. Amazon Creators API leads on agent ergonomics.

### Can an agent call Amazon Creators API and opencommerce without installing anything?

Yes. Amazon Creators API has a hosted endpoint at https://creatorsapi.amazon/catalog/v1 and opencommerce at https://api.agentcard.sh.


## For agents

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

## Other comparisons with Amazon Creators API or opencommerce

- [Amazon Creators API vs Best Buy Developer API](https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.md)
- [Amazon Creators API vs Etsy Open API v3](https://www.anchorterminal.com/compare/amazon-creators-api-vs-etsy.md)
- [Amazon Creators API vs Shop MCP](https://www.anchorterminal.com/compare/amazon-creators-api-vs-shop-mcp.md)
- [Amazon Creators API vs Walmart Affiliate Marketing API](https://www.anchorterminal.com/compare/amazon-creators-api-vs-walmart-affiliate-api.md)
- [Amazon Creators API vs Walmart Agent Gateway](https://www.anchorterminal.com/compare/amazon-creators-api-vs-walmart-agent-gateway.md)
- [Amazon Creators API vs Zillow in Claude](https://www.anchorterminal.com/compare/amazon-creators-api-vs-zillow-claude.md)
- [Best Buy Developer API vs opencommerce](https://www.anchorterminal.com/compare/best-buy-vs-opencommerce.md)
- [Etsy Open API v3 vs opencommerce](https://www.anchorterminal.com/compare/etsy-vs-opencommerce.md)
- [opencommerce vs Shop MCP](https://www.anchorterminal.com/compare/opencommerce-vs-shop-mcp.md)
- [opencommerce vs Walmart Affiliate Marketing API](https://www.anchorterminal.com/compare/opencommerce-vs-walmart-affiliate-api.md)
- [opencommerce vs Walmart Agent Gateway](https://www.anchorterminal.com/compare/opencommerce-vs-walmart-agent-gateway.md)
- [opencommerce vs Zillow in Claude](https://www.anchorterminal.com/compare/opencommerce-vs-zillow-claude.md)
- [Amazon Creators API vs Instacart Developer Platform API + MCP](https://www.anchorterminal.com/compare/amazon-creators-api-vs-instacart.md)
- [Instacart Developer Platform API + MCP vs opencommerce](https://www.anchorterminal.com/compare/instacart-vs-opencommerce.md)

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