revenue-mcp

blockers

mcp.crossingkeyintelligence.com

CrossingKey MCP for agent commerce, prepaid credits, and bounded paid XKEY validation.

https://mcp.crossingkeyintelligence.com/mcpUnknownMCP 2025-11-25v4.0.0-rc.1last checked 24 Oct 2026spoke MCP on 48.2% of 85 checks (30 days)initialize in 728 ms

Last checked 24 Oct 2026

✓Answered the MCP handshake (MCP 2025-11-25)
–Auth scheme could not be determined
✓Lists 28 tools
✕1 blocker
!Spoke MCP on 41 of 85 checks (30 days)

How to authenticate

Checked against the endpoint by our probe on 24 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	Unknown
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Refused — credentials required

What the probe found

blockerThe endpoint answered 530, not MCP

Expected a JSON-RPC response; got 17 bytes of text/plain; charset=UTF-8. Streamable HTTP endpoints accept a POST at the same URL a client connects to.

Tools

artifact.integrity_manifestcapability.getcapability.searchcatalog.listcommerce.quotecost.estimatecreator.applycredits.optionsexecution.preflighthash.encodejson.repairmachine_commerce.readiness_auditmarketplace.describemcp.launch_auditmcp.schema_auditoffers.listopenapi.quality_auditpii.scanprompt.auditprovider.applyprovider.describeprovider.getrequirements.checkresult.previewsecret.scanx402.compatibility_auditx402.purchase_path_auditxkey.validate

Contract history

16 Oct 2026v4.0.0-rc.111 breaking2 compatible1 cosmeticinstructions rewritten

Breaking: artifact.integrity_manifest, hash.encode, json.repair, machine_commerce.readiness_audit, mcp.schema_audit, openapi.quality_audit, pii.scan, prompt.audit, secret.scan, x402.compatibility_audit, xkey.validate

Instructions rewritten: artifact.integrity_manifest, credits.options, hash.encode, json.repair, machine_commerce.readiness_audit, mcp.schema_audit, openapi.quality_audit, pii.scan, prompt.audit, secret.scan, x402.compatibility_audit, xkey.validate. The description an agent follows changed; the callable contract may not have.

12 Oct 2026v3.0.11 breaking1 compatible

Breaking: provider.register

11 Oct 2026v3.0.16 compatible

5 Oct 2026v3.0.11 compatible

2 Oct 2026v3.0.02 breaking23 compatibleinstructions rewritten

Breaking: artifact.integrity_manifest, capability.execute

Instructions rewritten: xkey.validate. The description an agent follows changed; the callable contract may not have.

30 Sep 2026v3.0.01 compatible

28 Sep 2026v3.0.06 compatible

23 Sep 2026v3.0.024 breaking1 cosmeticinstructions rewritten

Breaking: capability.get, capability.search, catalog.list, commerce.quote, cost.estimate, creator.apply, credit.options, entitlement.inspect, execution.preflight, machine_capability.list, machine_capability.quote, marketplace.describe, offer.list, payment.methods, payment.verify, provider.describe, provider.get, provider.register, purchase.status, receipt.verify, requirement.check, result.preview, service.list, system.health

Instructions rewritten: xkey.validate. The description an agent follows changed; the callable contract may not have.

23 Sep 2026v3.0.05 compatible

22 Sep 2026v3.0.08 breaking14 compatible5 cosmeticinstructions rewritten

Breaking: capabilities.list, capability.get, capability.quote, credits.options, health, offers.list, requirements.check, services.list

Instructions rewritten: capability.get, cost.estimate, provider.describe, result.preview, xkey.validate. The description an agent follows changed; the callable contract may not have.

18 Sep 2026v2.4.016 breaking10 compatible2 cosmeticinstructions rewritten

Breaking: check_requirements, crossingkey.describe, discover_provider, estimate_cost, execution_preflight, fulfillment.get, fulfillment.status, get_offer, get_request_credit_links, list_capabilities, list_offers, list_request_services, payment.verify_onchain, preview_result_schema, purchase.status, xkey_validate_intake

Instructions rewritten: capabilities.list, capability.quote, purchase.status. The description an agent follows changed; the callable contract may not have.

18 Sep 2026v2.4.03 breaking23 cosmeticinstructions rewritten

Breaking: get_fulfillment_status, get_stripe_checkout_link, list_stripe_offers

Instructions rewritten: capabilities.list, capability.get, capability.quote, check_requirements, crossingkey.describe, discover_provider, entitlement.inspect, estimate_cost, execution_preflight, fulfillment.get, fulfillment.status, get_offer, get_request_credit_links, health, list_capabilities, list_offers, list_request_services, payment.methods, payment.verify_onchain, preview_result_schema, purchase.status, receipt.verify, xkey_validate_intake. The description an agent follows changed; the callable contract may not have.

16 Sep 2026v2.4.0no contract changes

15 Sep 2026v2.3.01 compatible

13 Sep 2026v2.2.0no contract changes

11 Sep 2026v2.1.011 compatible

10 Sep 2026v2.1.08 compatible

9 Sep 2026v2.1.0first recorded contract

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