Geocodio API
Geocodio API — forward and reverse geocoding for US and Canada addresses with congressional district, timezone, census tract, and school district appending.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Simple API key auth — no scopes or rotation mechanism. Key in query parameter is a minor risk (logged in access logs). TLS enforced. Small, focused service with minimal attack surface.
⚡ Reliability
Best When
Your agent needs to geocode US/Canada addresses with political district appending at low cost and high batch throughput.
Avoid When
You need global geocoding or real-time place autocomplete — Geocodio is US/Canada only.
Use Cases
- • Batch geocoding lists of addresses to lat/lng coordinates for agent geospatial analysis
- • Reverse geocoding GPS coordinates to structured addresses in agent location workflows
- • Appending congressional district, state legislature, and county to addresses for civic applications
- • Address standardization and validation for agent data pipelines before storage
- • Geocoding in bulk (25,000 addresses per batch request) for agent ETL pipelines
Not For
- • Global geocoding — Geocodio only covers US and Canada; use Google Maps or HERE for global
- • Real-time place search or autocomplete — use Google Places or Mapbox for interactive search
- • IP-based geolocation — use IPinfo or MaxMind GeoIP for IP-to-location
Interface
Authentication
Simple API key as query parameter (api_key=...). No OAuth complexity. Single key per account.
Pricing
Among the cheapest US geocoding APIs. Batch geocoding reduces per-lookup overhead. Free tier sufficient for development.
Agent Metadata
Known Gotchas
- ⚠ Unmatched addresses return empty results array without error — agents must check for empty results
- ⚠ Batch endpoint is async for very large batches (>10,000) — returns a batch ID to poll
- ⚠ API key is in the query string — ensure it's not logged in URL access logs
- ⚠ Congressional district appending has a per-field cost on top of base geocoding cost
- ⚠ Address parsing quality drops for non-standard formats — normalize addresses before geocoding
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Geocodio API.
Scores are editorial opinions as of 2026-03-06.