fourzerotwo
Server Details
350+ data APIs for agents: UK law, companies, property, sanctions, weather, papers. Free tier, x402
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-11-25
- URL
TDQS
Score is being calculated.
Available Tools
3 toolscall_apiCall a data APIRead-onlyIdempotentInspect
Run one endpoint by the tool name that search_apis returned, with that endpoint's parameters, and get its data back as JSON (with source and licence attribution). Endpoints with free_tier "free" or "sample" cost nothing within the daily allowance (50 calls/day anonymously, 500 with a free key). Otherwise the result is a payment request: pay in USDC via x402 and retry with _meta["x402/payment"]. Invalid arguments are rejected before any charge, and failed upstream calls are never charged.
| Name | Required | Description | Default |
|---|---|---|---|
| tool | Yes | Endpoint tool name from search_apis, e.g. "uk-postcodes__lookup" or "sanctions__screen". | |
| arguments | No | The endpoint's parameters as listed in search_apis results, e.g. {"postcode": "SW1A 1AA"}. |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
list_apisList API groupsRead-onlyIdempotentInspect
Overview of every API group in the catalog: name, category, summary, number of endpoints and whether it has a free tier. Always free to call. Use it to browse; use search_apis to find a specific endpoint.
| Name | Required | Description | Default |
|---|---|---|---|
| category | No | Optional category filter, e.g. "property". |
Output Schema
| Name | Required | Description |
|---|---|---|
| apis | Yes | |
| categories | Yes |
search_apisSearch data APIsRead-onlyIdempotentInspect
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.
| Name | Required | Description | Default |
|---|---|---|---|
| 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
| Name | Required | Description |
|---|---|---|
| total | Yes | |
| results | Yes |
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
3 tool updates
- Changed
call_api6 fields changed- added
Input schema / additionalPropertiesAdded value: +false - added
Input schema / properties / arguments / additionalPropertiesAdded value: +true - changed
Input schema / properties / arguments / descriptionPrevious value: -"The endpoint's parameters"New value: +"The endpoint's parameters as listed in search_apis results, e.g. {\"postcode\": \"SW1A 1AA\"}." - changed
Input schema / properties / tool / descriptionPrevious value: -"Tool name from search_apis, e.g. \"uk-police__street-crime\""New value: +"Endpoint tool name from search_apis, e.g. \"uk-postcodes__lookup\" or \"sanctions__screen\"." - added
Input schema / properties / tool / patternAdded value: +"^[a-z0-9-]+__[a-z0-9-]+$" - changed
Output schema / (root)Previous value: -nullNew value: +{ + "additionalProperties": true, + "description": "The endpoint's JSON response. Proxied sources return {data, source{name, licence, attribution}}; first-party endpoints return their own documented object. List responses are wrapped as {result: [...]}.", + "type": "object" +}
- Added
list_apis - Changed
search_apis5 fields changed- added
Input schema / additionalPropertiesAdded value: +false - added
Input schema / properties / categoryAdded value: +{ + "description": "Optional category filter, e.g. \"legal\", \"property\", \"finance\", \"research\", \"energy\", \"network\". See list_apis for all categories.", + "type": "string" +} - added
Input schema / properties / limitAdded value: +{ + "default": 20, + "description": "Maximum results (default 20).", + "maximum": 50, + "minimum": 1, + "type": "integer" +} - changed
Input schema / properties / query / descriptionPrevious 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\"." - changed
Output 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" +}
2 tool updates
- First observed
call_api - First observed
search_apis
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