CrossingKey MCP
Agent-native MCP for governed commerce, x402 payments, paid capabilities, and verifiable receipts.
Should I use this
Quality & Safety
Findings (7)
- LOWTool 'x402.compatibility_audit' doesn't follow camelCase/snake_casein x402.compatibility_audit
- LOWTool 'mcp.schema_audit' doesn't follow camelCase/snake_casein mcp.schema_audit
- LOWTool 'openapi.quality_audit' doesn't follow camelCase/snake_casein openapi.quality_audit
- LOWTool 'machine_commerce.readiness_audit' doesn't follow camelCase/snake_casein machine_commerce.readiness_audit
- LOWTool 'machine_commerce.readiness_audit' name length outside 3-30 rangein machine_commerce.readiness_audit
- LOWTool 'artifact.integrity_manifest' doesn't follow camelCase/snake_casein artifact.integrity_manifest
- LOWTool 'xkey.validate' doesn't follow camelCase/snake_casein xkey.validate
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"crossingkey-mcp": {
"url": "https://mcp.crossingkeyintelligence.com/mcp"
}
}
}Remote endpoints
https://mcp.crossingkeyintelligence.com/mcpstreamable-httpWhat it can do
Tool inventory
Tools (6)
⚪x402.compatibility_audit(url)
PAID $1.00 USDC on Base via x402. Audits an x402 endpoint for v1/v2 compatibility defects. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Input Schema
{
"type": "object",
"properties": {
"url": {
"type": "string",
"format": "uri",
"description": "Public HTTP(S) x402 endpoint to audit."
}
},
"required": [
"url"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪mcp.schema_audit(tools)
PAID $1.00 USDC on Base via x402. Scores supplied MCP tool schemas for discoverability, descriptions, and bounded input contracts. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Input Schema
{
"type": "object",
"properties": {
"tools": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": {}
},
"minItems": 1,
"description": "MCP tool definitions to audit."
}
},
"required": [
"tools"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪openapi.quality_audit(spec)
PAID $1.00 USDC on Base via x402. Evaluates structural quality and required fields in an OpenAPI document. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Input Schema
{
"type": "object",
"properties": {
"spec": {
"type": "object",
"additionalProperties": {},
"description": "Parsed OpenAPI document to audit."
}
},
"required": [
"spec"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪machine_commerce.readiness_audit(url)
PAID $2.00 USDC on Base via x402. Checks machine-commerce discovery and health surfaces. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Input Schema
{
"type": "object",
"properties": {
"url": {
"type": "string",
"format": "uri",
"description": "Base URL of the machine-commerce service to audit."
}
},
"required": [
"url"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪artifact.integrity_manifest(artifacts)
PAID $0.10 USDC on Base via x402. Creates deterministic SHA-256 entries and a root manifest hash for supplied text artifacts. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Input Schema
{
"type": "object",
"properties": {
"artifacts": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string",
"minLength": 1,
"maxLength": 300,
"description": "Artifact name."
},
"content": {
"type": "string",
"description": "Text content to hash."
}
},
"required": [
"name",
"content"
],
"additionalProperties": false
},
"minItems": 1,
"description": "Artifacts to include in the integrity manifest."
}
},
"required": [
"artifacts"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪xkey.validate(idempotency_key, raw_intake)
PAID prepaid-credit XKEY intake validation. Requires an authenticated ck_ principal and commits one credit only on verified success. Discovery is free; execution is not.
Input Schema
{
"type": "object",
"properties": {
"idempotency_key": {
"type": "string",
"minLength": 8,
"maxLength": 160,
"pattern": "^[A-Za-z0-9._:-]+$",
"description": "Unique client-generated idempotency key; 8-160 ASCII characters."
},
"raw_intake": {
"type": "string",
"minLength": 2,
"maxLength": 100000,
"description": "Raw intake text to validate and normalize; 2-100000 characters."
}
},
"required": [
"idempotency_key",
"raw_intake"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
Evidence