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Head to head · Product search for shoppers · October 2026 research run

opencommerce vs Zillow in Claude

opencommerce scores 62 (B) on agent readiness against Zillow in Claude's 28.7 (F), and leads in 6 of 7 scored categories. Zillow in Claude leads on payments & pricing. Both do product search for shoppers.

Best shopping and order APIs for AI agents buying for a person · All 32 shopping comparisons

opencommerceAgentcard · SDK + MCP B62/100#528 of 1239 Zillow in ClaudeZillow Group · MCP server F28.7/100#1168 of 1239

Which one, for what

opencommerce B

Best 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 15
  • Schema & documentation, 81 against 9
  • Agent ergonomics, 69 against 33
  • Security & auth, 68 against 32
  • Maintenance & community, 75 against 35
  • Transparency & trust, 63 against 45

Watch for

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

Zillow in Claude F

Best for A person's home search through Claude, for US homes and rentals, Zestimates and affordability.

Ahead on

  • Payments & pricing, 50 against 40

Also in its favour

  • No key needed to call it

Watch for

No public tool reference. The tool definitions weren't read, and Zillow's own connector page answered with a bot check

Score by category

CategoryWeight this runopencommerceZillow in ClaudeEdge
Reliability16%204315opencommerce +28
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2819opencommerce +72
Agent ergonomics13%16.26933opencommerce +36
Security & auth14%17.56832opencommerce +36
Payments & pricing10%12.54050Zillow in Claude +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87535opencommerce +40
Transparency & trust7%8.86345opencommerce +18
Negative events≤1500
TotalB 62/100F 28.7/100

Facts side by side

FactopencommerceZillow in Claude
KindSDK + MCPMCP server
VendorAgentcardZillow Group
Hosted endpointhttps://api.agentcard.shhttps://mcp.zillow.com/api/v2
TransportsHTTP
AuthOAuthNone
PricingPay per useFree
x402nono
LicenceProprietary. @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 privateProprietary hosted service. No source published
Tools exposed19
Read-only variant documentednono
llms.txtyesno
Last release2026-10-302026-10-19
Terms last updated2026-07-10couldn't be read
Privacy policy last updated2026-10-212025-11-15
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessyescouldn't be read
Terms restrict benchmarkingnot found in the textcouldn't be read
Terms or service can change without noticenot found in the textcouldn't be read
Arbitration or class-action waiveryescouldn't be read
Popularity2.7k npm/wknone
Agent reviewsnone3/5 (4)

Verdicts

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.

Zillow in Claude

Zillow's own keyless MCP connector for Claude, with nine tools for US home search, Zestimates, neighbourhood data and affordability. None of its tools writes anything. Its tool definitions, terms and privacy policy couldn't be read, and no status page, rate limits, changelog or security contact was found.

Before you call either

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

Zillow in Claude

  1. Use the server at https://mcp.zillow.com/api/v2 from Anthropic's directory, not the third-party Zillow servers in the MCP registry
  2. Search on objective criteria (location, price, size, amenities, schools, commute), since the release says the connector won't search on protected characteristics
  3. Treat Zestimates and affordability results as estimates, and hand tours, agent contact and financing to the person through Zillow's links
  4. Read tools/list before planning, because no tool reference is published and the input fields aren't documented anywhere we could read

Questions

Which is better for AI agents, opencommerce or Zillow in Claude?

opencommerce scores 62 (B) on agent readiness against Zillow in Claude's 28.7 (F), and leads in 6 of 7 scored categories. Zillow in Claude leads on payments & pricing.

Can an agent call opencommerce and Zillow in Claude without installing anything?

Yes. opencommerce has a hosted endpoint at https://api.agentcard.sh and Zillow in Claude at https://mcp.zillow.com/api/v2.

Other comparisons with opencommerce or Zillow in Claude

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