crossingkey-mcp

FREE, read-only x402 capability list. Use this only for deterministic machine-commerce capabilities priced for x402 execution; it does not list the full CrossingKey offer/service catalog and never executes a capability. For public offers use offers.list.

FREE, read-only x402 capability detail lookup. Supply the exact capability name returned by capabilities.list to receive one deterministic capability definition and advertised price; no payment or execution occurs. Use capability.quote when x402 challenge requirements are needed.

FREE, read-only x402 quote/challenge lookup. Supply the exact capability name returned by capabilities.list to receive v1 and v2 payment requirements without execution or settlement. Use capability.get for metadata only and execution.preflight for the cross-domain authorization decision.

FREE, read-only cross-domain price lookup. Supply an offer or capability identifier to return the currently advertised USD price or request-credit cost; no payment, reservation, or credit consumption occurs. For x402 challenge terms use capability.quote instead.

FREE, read-only prepaid-credit purchase discovery. Returns available request-credit packs and their existing Stripe Payment Links; it does not open a checkout session or spend funds. Use this only when prepaid request credits are the intended payment rail.

FREE, read-only entitlement inspection. Supply a CrossingKey entitlement identifier to return current entitlement state without granting execution, download access, or paid result content. Use purchase.status when only an idempotency key is available.

FREE, read-only final preflight before any paid action. Supply an offer or capability identifier to receive payment method, exact advertised price, readiness, safety warnings, and next action; this tool never charges or executes. Call it after discovery and requirement checks, not as a replacement for paid execution.

FREE, read-only MCP readiness check. Returns service, Stripe, machine-commerce, mainnet-gate, and receiver-only wallet readiness flags without contacting payment rails or changing state. Use this for operational readiness, not purchase status.

FREE, read-only canonical offer search. Use this to find public digital or service offers by query, kind, or maximum USD price before payment; it returns metadata only and creates no checkout session. Use capability.get only for x402 capability detail; offer details are returned by offers.list.

FREE, read-only payment-rail discovery. Returns supported Stripe, prepaid-credit, and x402 rails plus the receiver-only wallet authority boundary; it never signs or spends. Use this when selecting a payment rail before any authorization step.

FREE, read-only Base USDC verification. Provide a Base transaction hash, a CrossingKey receipt ID, or both to verify the receiver transfer and optionally reconcile an existing receipt; it never signs, sends, settles, swaps, bridges, or spends funds. Use receipt.verify for local receipt integrity without chain lookup.

FREE, read-only provider discovery. Use this first to learn CrossingKey identity, commerce model, payment rails, authority boundaries, and recommended next actions; it never creates a payment or executes paid work. For offer-specific data use offers.list and capability.get, and for x402 terms use capability.get/capability.quote.

FREE, read-only x402 purchase-status lookup. Supply the original idempotency key to retrieve purchase state and integrity identifiers without revealing paid result content or changing state. The response includes purchase, entitlement, and result-integrity identifiers when available.

FREE, read-only receipt integrity verification. Supply a CrossingKey receipt object to recompute and compare its deterministic result hash; this performs no payment, entitlement mutation, or network settlement. A true result verifies integrity only, not external payment finality.

FREE, read-only prerequisite check. Supply an offer or capability identifier to receive payment, authorization, fulfillment, and idempotency requirements without creating a payment. Use execution.preflight for the final machine-readable go/no-go decision.

FREE, read-only result preview. Supply an offer or capability identifier to see the expected fulfillment or output shape without exposing paid content or executing work. Use this after offers.list or capabilities.list when an agent needs to evaluate the result contract before authorization.

FREE, read-only service catalog. Returns only request services explicitly approved by the server's safety process and may legitimately be empty; it creates no order or payment. Use this when evaluating approved request-service availability.

PAID bounded intake validation. Requires an authenticated prepaid-credit principal, an 8-160 character idempotency key, and 2-100000 characters of raw intake; one credit is committed only on verified success, while safe validation failures release the reservation. Do not call speculatively; use requirements.check and execution.preflight first.