No ETL before the first lookup
Type a code and get a place, region and format, with a country page that explains the rules.
COMPARE · POSTCODEDOG VS POSTCODEBASE
PostcodeDog vs PostCodeBase
PostCodeBase sells data. PostcodeDog is a lookup you can open.
PostCodeBase provides global postal-code and address data for teams that need datasets. PostcodeDog covers 82 countries with one lookup, batch checks, a free API and MCP.
SIDE BY SIDE
What changes with PostcodeDog
| Capability | UsPostcodeDog | PostCodeBase | Why it matters |
|---|---|---|---|
| Form | Lookup, batch, API and MCP | Data product | No import or licence step before the first answer. |
| Access | Free, no account | Commercial licence | A quick check stays free. |
| Input | Paste an address, city or code; country and format detected | Import into your stack | Use the text the customer sent. |
| Batch | Paste up to 50 rows, review, export CSV | Bulk data | Clear a queue without a pipeline. |
| AI agents | Built-in MCP server at /mcp | — | Connect the lookup to an agent. |
WHERE POSTCODEDOG WINS
Open data, without the data project.
Built for the label desk
Batch checks, platform pages and carrier pages turn data into the steps a shipping team performs.
One source for people and agents
The web box, JSON API and MCP server share one lookup.
TRY IT
Try the difference
Paste a full address, a city or a post code. Country and format are detected.
Free. No account, no API key.THE LOOP
Paste → resolve → verify
The same three steps work whether the address is a US ZIP, a UK outcode or a Japanese 〒.
- 01
Paste what you have
A full address, a city, or just a code. The parser accepts the whole line.
- 02
Confirm the place and format
Country, region and post code format are shown together, with nearby codes for a second option.
- 03
Send it to the label
Copy the verified code or export the batch. Platform and carrier pages keep local rules in view.
About
About PostCodeBase
PostCodeBase provides global postal-code and address data for teams that need datasets.
It is a postal data product for teams building with datasets.
When PostcodeDog is the better fit
- 01You want a lookup without buying or importing a database.
- 02Your team checks addresses in a browser.
- 03You want batch checks and CSV export.
- 04You want an MCP server for AI clients.
Is PostCodeBase a lookup?
PostCodeBase is a data product. PostcodeDog is a ready lookup with a browser, batch, API and MCP.
Is PostcodeDog affiliated with PostCodeBase?
No. PostCodeBase is an independent data provider; PostcodeDog is a separate lookup.
Is PostcodeDog free?
Yes. Lookups, batch checks, the JSON API and the MCP server are free and need no account.
Can I use it in an AI agent?
Yes. The MCP server is at /mcp, and the JSON API is free to call.
Compare
Try PostcodeDog instead of PostCodeBase.
Try 90210, SW1A or 100-0001. No signup, no credit card.