apitap

Move whole tables between databases at wire speed, in bounded memory.

Despite the name, this is not an API-client library: apitap is a Rust transfer engine that speaks the databases’ own wire formats — binary COPY, RowBinary, LOAD DATA, logical replication. How it compares to Airbyte-class tools, CDC daemons and Python pipelines, with measured numbers: docs/vs.md.

apitap is the open-source transfer engine behind apitap cloud — a Rust core with Python bindings, in the spirit of Polars. It moves data the way the databases themselves would: raw wire-format streams, parallel range pipes, atomic swaps, and memory that stays flat no matter how big the table is.

pip install apitap

import apitap

report = apitap.transfer(
    "postgres://user:pass@src-host/db",
    "postgres://user:pass@dst-host/db",
    table="public.events",
)
print(f"{report.rows:,} rows in {report.elapsed_ms} ms over {report.parallel} pipes")

The same call does batch CDC — logical replication on a schedule, no daemon — and mixes modes per table:

apitap.transfer(src, dst,…