x402 Doctor

Fix plan for an x402 endpoint ($0.05 via x402)

x402_fix

Read-only

Paid ($0.05 USDC via x402 on Base or Solana): diagnoses your x402 endpoint, then returns per problem the concrete change as code for your stack (express, next, hono, node, python, generic), filled in with your own payTo, amount, network and route. For the endpoint's owner: includes the diagnosis, so there is no need to call x402_diagnose first. Same as GET /api/v1/fix. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.

Input Schema

TableJSON Schema

Name	Required	Description
`url`	Yes	The x402 endpoint (public http(s) URL), e.g. https://api.example.com/paid
`stack`	No	Your server stack (default: detected)
`method`	No	HTTP method of the paid route (default: GET, then POST)

Output Schema

TableJSON Schema

Name	Required	Description
`url`	No
`fixes`	No	Each problem with steps and code for your stack
`accepts`	No	Only on an unpaid call: the x402 payment options
`overall`	No	pass, warn or fail
`receipt`	No	Signed receipt (EIP-191) binding the answer to your arguments
`summary`	No
`unfixed`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 9, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {
+    "accepts": {
+      "anyOf": [
+        {
+          "$ref": "#/properties/fixes/anyOf/0"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Only on an unpaid call: the x402 payment options"
+    },
+    "fixes": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Each problem with steps and code for your stack"
+    },
+    "overall": {
+      "description": "pass, warn or fail",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "receipt": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Signed receipt (EIP-191) binding the answer to your arguments"
+    },
+    "summary": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "unfixed": {
+      "anyOf": [
+        {
+          "$ref": "#/properties/fixes/anyOf/0"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "url": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedSep 25, 2026

TDQS

Score is being calculated.

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