> For the complete documentation index, see [llms.txt](https://developers.gleantap.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.gleantap.com/update-data/merge-contacts.md).

# Merge Contacts

## Merge two contacts

> Merge two contacts into a single contact, combining their data

```json
{"openapi":"3.0.0","info":{"title":"Gleantap External API","version":"1.0.0"},"tags":[{"name":"Contacts","description":"Contacts"}],"servers":[{"url":"https://api.gleantap.com","description":"Production server"}],"paths":{"/v2/ExternalApi/mergeContacts":{"post":{"tags":["Contacts"],"summary":"Merge two contacts","description":"Merge two contacts into a single contact, combining their data","operationId":"059c0d7d021b302505de2afaaa57e219","parameters":[{"name":"X-API-KEY","in":"header","description":"Your API key","required":true,"schema":{"type":"string"}},{"name":"X-SECRET-KEY","in":"header","description":"Your Secret key","required":true,"schema":{"type":"string"}}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"required":["app_id","from_contact","to_contact"],"properties":{"app_id":{"type":"string"},"from_contact":{"description":"ID of the contact that will remain after merge","type":"string"},"to_contact":{"description":"ID of the contact that will be merged and deleted","type":"string"}},"type":"object"}}}},"responses":{"200":{"description":"Contacts merged successfully","content":{"application/json":{"schema":{"properties":{"status":{"type":"boolean"},"message":{"type":"string"}},"type":"object"}}}},"400":{"description":"Invalid request or contacts not found"},"500":{"description":"Error during merge process"}}}}}}
```