PSGC MCP Server

A Model Context Protocol server that provides Philippine Standard Geographic Code (PSGC) data to LLMs. Built on Cloudflare Workers with KV storage.

Public, read-only, no authentication required. Data sourced directly from the Philippine Statistics Authority quarterly PSGC publication. Cached in Cloudflare KV for reliability and low-latency global access.

Tools

Geographic Levels

Response Format

All data responses are wrapped in a standard envelope:

{
  "_meta": {
    "dataset_version": "PSGC Q4 2025",
    "dataset_date": "2025-12-31",
    "last_synced": "2026-03-02",
    "source": "Philippine Statistics Authority (PSA)",
    "source_url": "https://psa.gov.ph/classification/psgc/"
  },
  "data": { ... }
}

Error responses (isError: true) and informational messages (e.g. "No children found") are returned as plain text without wrapping.

Entity Schema

Entity objects returned by lookup, get_hierarchy, list_children, and list_by_type use snake_case field names:

All fields are always present. Fields without data are null, never omitted.

Search Results

The search tool returns a lighter result object:

Strict Search

The search tool accepts an optional strict boolean parameter. When strict: true, only exact name matches are returned (after normalization). Partial and substring matches are excluded. Useful when you know the exact place name and want to avoid ambiguous results.

Connect

Add to your MCP client configuration:

{
  "mcpServers": {
    "psgc": {
      "url": "https://psgc-mcp.godmodearch.workers.dev/mcp"
    }
  }
}

Quick test

curl -X POST https://psgc-mcp.godmodearch.workers.dev/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "search",
      "arguments": { "query": "Carmona", "level": "Mun" }
    }
  }'

PSGC Code Format

PSGC codes are 10 digits with no spaces. The segments encode the full geographic hierarchy:

1 4 0 2 1 0 0 0 0 0
│ │ └─┬─┘ └─┬─┘ └─┬─┘
│ │   │     │     └── Barangay (last 3 digits)
│ │   │     └──────── Municipality/City (3 digits)
│ │   └────────────── Province (2 digits)
│ └────────────────── Island Group modifier
└──────────────────── Region (1 digit)

Leading zeros are significant — 014021000000 and 14021000000 are different codes. Always use the full 10-digit string.

Known edge cases:

• NCR uses Districts instead of Provinces (Dist level)

• Cotabato City is administratively in BARMM but geographically in Region XII — it appears under Prov code 124700000 (Maguindanao del Norte)

• BARMM Special Geographic Units (SGU) don't follow the standard hierarchy and have no Province parent

Data Sources

Last synced: March 2, 2026.

Breaking Changes (v1.1.0)

• All data responses are now wrapped in { _meta, data }. Consumers must unwrap data from the response.

• Entity field names changed to snake_case: code is now psgc_code, parent is now parent_code, cityClass is now city_class, etc.

• Search results use psgc_code instead of code.

• All entity fields are always present. Previously optional fields now appear as null instead of being omitted.

• Internal fields regionCode and provinceCode are no longer exposed in API responses.

Related Projects

Part of a suite of Philippine public data MCP servers:

• PSGC MCP (this repo)

• PH Holidays MCP -> Coming soon

• BSP Bank Directory MCP -> Coming soon

All servers are free, public, and read-only. Data pulled from official Philippine government sources.

Contributing and Issues

Found a data error or an edge case that isn't handled? Open an issue. The quirks section above covers the most common ones, but PSGC data has accumulated inconsistencies over decades of LGU reclassifications and the issues list is the best place to track them.

PSA publishes updates quarterly. If the data looks stale, open an issue and it will be refreshed ahead of the next scheduled sync.

Data Pipeline

The PSGC data is parsed from PSA's Excel publication and stored in Cloudflare KV. To update:

1. Download the PSGC Excel file

Get the latest publication from PSA PSGC and place it in scripts/data/.

2. Diff (optional)

npm run diff-psgc -- "scripts/data/Q3 2025/PSGC-3Q-2025-Publication-Datafile.xlsx" "scripts/data/PSGC-4Q-2025-Publication-Datafile (1).xlsx"

Compares two quarterly Excel files and reports additions, removals, name changes, and field changes. Run this before the full parse to verify PSA's changelog.

3. Parse

npm run parse-psgc

Reads the Excel file, derives parent relationships, and writes chunked JSON files to scripts/data/output/.

4. Upload to KV

npm run upload-kv

Bulk uploads all JSON chunks to Cloudflare KV via wrangler.

5. Deploy

npm run deploy

Development

npm install
npm run dev

Dev server starts at http://localhost:8787. Connect your MCP client to http://localhost:8787/mcp.

Setup

Before first deploy, create the KV namespace:

npx wrangler kv namespace create PSGC_KV

Update wrangler.jsonc with the returned namespace ID.

Built by

Aaron Zara - Fractional CTO at Godmode Digital

Previously built REN.PH, a programmatic real estate platform with 60,000+ structured geographic pages covering every barangay, city, and province in the Philippines. The PSGC MCP came out of needing reliable, queryable PH geography data for AI agents and not finding anything that fit.

For enterprise SLAs, custom integrations, or other PH data sources: → godmode.ph

License

MIT