FreeTier Agent API

dump/world-reference

dump_world_reference

Read-only

Dataset download: $1 USDC via x402. Full dump: 252 countries (GeoNames, CC BY 4.0), 418 time zones, ~14,000 public holidays 2026-2027 (python-holidays, MIT). JSON.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "dump_world_reference"
  }
}

Input Schema

Name	Required	Description	Default
No arguments

Output Schema

Name	Required	Description	Default
`license`	No
`sources`	No
`holidays`	No
`countries`	No
`timezones`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 26, 2026

changedOutput schema / description

Previous value: -"Inferred from a real response captured on 2026-10-24; extra fields may appear, null-valued fields are untyped."New value: +"Inferred from a real response captured on 2026-10-26; extra fields may appear, null-valued fields are untyped."

Changed1 schema field changedOct 24, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "Inferred from a real response captured on 2026-10-24; extra fields may appear, null-valued fields are untyped.",
+  "properties": {
+    "countries": {
+      "items": {
+        "properties": {
+          "area_km2": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "capital": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "continent": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "currency_code": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "currency_name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "iso2": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "iso3": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "iso_numeric": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "languages": {
+            "type": [
+              "array",
+              "null"
+            ]
+          },
+          "name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "neighbours": {
+            "type": [
+              "array",
+              "null"
+            ]
+          },
+          "phone_prefix": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "population": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "timezones": {
+            "items": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "type": "array"
+          },
+          "tld": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "holidays": {
+      "additionalProperties": {
+        "properties": {
+          "2026": {
+            "items": {
+              "type": [
+                "array",
+                "null"
+              ]
+            },
+            "type": "array"
+          },
+          "2027": {
+            "items": {
+              "type": [
+                "array",
+                "null"
+              ]
+            },
+            "type": "array"
+          }
+        },
+        "type": "object"
+      },
+      "type": "object"
+    },
+    "license": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "sources": {
+      "items": {
+        "properties": {
+          "license": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "snapshot": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "url": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "timezones": {
+      "items": {
+        "properties": {
+          "country": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "dst_offset_jul": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "gmt_offset_jan": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "raw_offset": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "timezone": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}

First observedOct 18, 2026

TDQS

A3.9/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only cover read-only and open-world; the description adds the critical operational fact that access costs $1 USDC via x402, plus data provenance and licensing (GeoNames CC BY 4.0, python-holidays MIT). That payment gate is exactly the kind of behavioral context annotations cannot express. It stops short of explaining the payment flow or what happens before payment succeeds.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Dense, front-loaded, and every clause earns its place: cost, coverage, provenance, license, format. No filler and no restatement of the title.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, return values need not be explained, and the description covers content, cost, and format. It omits any sense of payload size or delivery mechanics for what is explicitly a 'full dump', which matters for an agent deciding to download it.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Zero parameters, so the baseline is 4. The description adds that the payload is JSON, which is the only relevant detail a parameterless tool can carry.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a concrete resource (a full world-reference dump) and enumerates its contents with counts: 252 countries, 418 time zones, ~14,000 holidays. The word 'Full dump' implicitly carves it out from the per-item siblings (country, holidays), though it never names them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The 'Full dump' framing implies you should take this when you want the complete dataset rather than a single record, and the $1 USDC price is a real selection signal. But there is no explicit when-to-use, no named alternative such as country or holidays, and no guidance on when the cost is worth paying.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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