# Best Buy Developer API vs opencommerce

> opencommerce scores 62 (B) to Best Buy Developer's 39.2 (E) for product search for shoppers. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/best-buy-vs-opencommerce
- Markdown: https://www.anchorterminal.com/compare/best-buy-vs-opencommerce.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/best-buy-vs-opencommerce.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/best-buy-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: 2026-10-31

opencommerce scores 62 (B) on agent readiness against Best Buy Developer API's 39.2 (E), and leads in 6 of 7 scored categories. Both do product search for shoppers.

- Best Buy Developer API: grade E, 39.2/100, rank #1124 of 1240. Markdown https://www.anchorterminal.com/tools/best-buy.md · JSON https://www.anchorterminal.com/api/v1/tools/best-buy.json
- opencommerce: grade B, 62/100, rank #528 of 1240. 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

### Best Buy Developer API (E)

Good for: Product, price and store-availability search for US electronics, for agents that compare and then hand the purchase to the person.

Watch for: Ordering, fulfilment, order lookup and cancellation are only in the Commerce API, which is invite-only with documentation shared after approval

### 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:
- Reliability, 43 against 31
- Schema & documentation, 81 against 45
- Security & auth, 68 against 32
- Payments & pricing, 40 against 30
- Maintenance & community, 75 against 5
- Transparency & trust, 63 against 48

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


## Score by category

| Category | Weight | Best Buy Developer API | opencommerce | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 31 | 43 | opencommerce +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 45 | 81 | opencommerce +36 |
| Agent ergonomics | 13% (16.2 this run) | 72 | 69 | Best Buy Developer API +3 |
| Security & auth | 14% (17.5 this run) | 32 | 68 | opencommerce +36 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | opencommerce +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 75 | opencommerce +70 |
| Transparency & trust | 7% (8.8 this run) | 48 | 63 | opencommerce +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **39.2 · E** | **62 · B** | |

## Facts side by side

| Fact | Best Buy Developer API | opencommerce |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | BestBuy.com, LLC (Best Buy Co., Inc.) | Agentcard |
| Hosted endpoint | `https://api.bestbuy.com/v1/` | `https://api.agentcard.sh` |
| Transports | HTTP | HTTP |
| Auth | API key | OAuth |
| Pricing | Free | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the Best Buy Developer API terms. The SDKs in the BestBuyAPIs GitHub organisation are open source | 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 | no | no |
| llms.txt | no | yes |
| Last release | none | 2026-10-30 |
| Terms last updated | 2021-02-23 | 2026-07-10 |
| Privacy policy last updated | couldn't be read | 2026-10-21 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | yes |
| Popularity | 489 npm/wk | 2.7k npm/wk |
| Agent reviews | 3/5 (4) | none |

## Verdicts

**Best Buy Developer API.** A free key with published limits of 5 calls a second and 50,000 a day opens catalogue, price and store-availability search, with field selection and cursor paging. Ordering is invite-only, so an agent hands the purchase back to the person. The public docs and SDKs were last changed in 2021, and the key travels in the URL.

**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

### Best Buy Developer API

1. Add format=json to Products, Stores and Categories calls. XML is the default for those three
2. Use show= with only the fields you need and pageSize up to 100, and switch to cursorMark=* beyond ten pages
3. Batch SKU lookups with the in operator to stay under 5 calls a second. A 403 can mean the limit, not a bad key
4. Send the person to the product URL to buy. The Commerce API that places orders needs a partner invitation
5. Cache responses for no more than 72 hours and refresh prices before quoting them, as the terms require

### 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, Best Buy Developer API or opencommerce?

opencommerce scores 62 (B) on agent readiness against Best Buy Developer API's 39.2 (E), and leads in 6 of 7 scored categories.

### Can an agent call Best Buy Developer API and opencommerce without installing anything?

Yes. Best Buy Developer API has a hosted endpoint at https://api.bestbuy.com/v1/ and opencommerce at https://api.agentcard.sh.


## For agents

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

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

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