fourzerotwo

Search data APIs

search_apis

Read-onlyIdempotent

Find the right data endpoint for a task. Searches 350+ endpoints (UK legislation, Companies House, property prices, sanctions lists, vehicle tax, weather, earthquakes, arXiv/PubMed/Crossref papers, IP geolocation, GB electricity, ONS/World Bank/ECB economics, and more) by keyword and returns each match's tool name, parameters, price and free_tier. Always free to call. Next step: pass a returned tool name to call_api.

Input Schema

TableJSON Schema

Name	Required	Description
`limit`	No	Maximum results (default 20).
`query`	No	Keywords describing the data you need; every word must match. Examples: "postcode", "sanctions screen", "sold prices", "earthquake", "bank holiday".
`category`	No	Optional category filter, e.g. "legal", "property", "finance", "research", "energy", "network". See list_apis for all categories.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`total`	Yes
`results`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedOct 11, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

addedInput schema / properties / category

Added value: +{
+  "description": "Optional category filter, e.g. \"legal\", \"property\", \"finance\", \"research\", \"energy\", \"network\". See list_apis for all categories.",
+  "type": "string"
+}

addedInput schema / properties / limit

Added value: +{
+  "default": 20,
+  "description": "Maximum results (default 20).",
+  "maximum": 50,
+  "minimum": 1,
+  "type": "integer"
+}

changedInput schema / properties / query / description

Previous value: -"Keywords, e.g. \"probate\" or \"postcode\""New value: +"Keywords describing the data you need; every word must match. Examples: \"postcode\", \"sanctions screen\", \"sold prices\", \"earthquake\", \"bank holiday\"."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "results": {
+      "items": {
+        "properties": {
+          "api": {
+            "type": "string"
+          },
+          "category": {
+            "type": "string"
+          },
+          "description": {
+            "type": "string"
+          },
+          "endpoint": {
+            "type": "string"
+          },
+          "free_tier": {
+            "enum": [
+              "free",
+              "sample",
+              null
+            ],
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "params": {
+            "type": "array"
+          },
+          "price_usd": {
+            "type": "string"
+          },
+          "tool": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "tool",
+          "api",
+          "endpoint",
+          "price_usd"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "total": {
+      "type": "integer"
+    }
+  },
+  "required": [
+    "total",
+    "results"
+  ],
+  "type": "object"
+}

First observedOct 11, 2026

TDQS

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