Postcodes

00Overview

UK postcode lookup, validation and geocoding (postcodes.io)

Every field below is exactly what you see in the Flomation editor. Fields marked ● live picker let you choose from a list pulled live from your account — no IDs to look up.

01Connecting Postcodes

Postcodes nodes have no credential fields — there is no API key or secret to add as an environment secret. Fill in each node's own fields, listed below, and run the flow.

02Nearest

Nearest Postcodes

ukgov/postcodes/nearest_postcodes · Action

List UK postcodes geographically nearest to a given postcode (postcodes.io)

Returns: tool_result, results, count, success, error

03Postcode

Postcode Lookup

ukgov/postcodes/postcode_lookup · Action

Resolve a UK postcode to coordinates, region and administrative areas (postcodes.io)

Returns: tool_result, result, latitude, longitude, region, success, error

04Reverse

Reverse Geocode

ukgov/postcodes/reverse_geocode · Action

Find the nearest UK postcodes to a latitude/longitude (postcodes.io)

Returns: tool_result, results, nearest, count, success, error

05Validate

Validate Postcode

ukgov/postcodes/validate_postcode · Action

Check whether a string is a valid UK postcode (postcodes.io)

Returns: tool_result, valid, success, error

06Notes & Limitations

Behaviours and constraints worth knowing before you build with these nodes.

• Coverage is limited to UK postcodes, so lookups and validation on non-UK or unrecognised inputs return no match even when the text is well-formed.
• Validation checks whether a postcode actually exists in the dataset rather than just its format, so a correctly-formatted but retired or unassigned postcode is reported as invalid.
• Reverse geocode searches only within a limited radius of the supplied coordinates, so points in remote areas or outside the UK may return no nearby postcodes.
• These nodes are a read-only reference service, so they can look up and validate postcodes but never create or change any data.