litellm/tests/unit/proxy/spend_tracking
devin-ai-integration[bot] 86a91f35de
fix(responses): log and bill every round of non-stream MCP auto-execute (#43667)
* fix(responses): log and bill every round of non-stream MCP auto-execute

Both model rounds run as internal sub-calls on the request's logging object, and the outer call logs the response the client received with usage, cost, and cost breakdown summed across the rounds. The internal-call gate now also covers the sync success callbacks, so an inner round no longer takes their first-wins slot

* fix(caching): let the parent call log and bill an internal sub-call's cache hit

A round of non-stream MCP auto-execute that the response cache served fired the
cache-hit callbacks on the shared logging object, so the spend log kept round 1's
function_call row and dropped the billed row for the answer. Internal sub-call cache
hits now fire no callbacks and carry a zero cost, and the summed cost breakdown leaves
out rounds served from the cache

* fix(logging): keep a parent row unique when its response came from the response cache

A RAG query or an MCP turn whose final round is served from the cache hands back the cached response's id, which already belongs to the row that cached it, so SpendLogs dropped the new row as a duplicate. Such a row now gets the cache-hit id suffix, and it is logged as a cache hit when it cost nothing.

* fix(logging): skip the zero-cost warning for a response served from the cache at no charge

A non-stream MCP auto-execute request whose rounds the response cache served is priced
at $0 before the parent marks it a cache hit, so it logged a false 'priced at $0'
warning and counted in litellm_zero_cost_requests_total. The diagnostic now treats a
response the cache served at no charge the same as a marked cache hit

* fix(responses): bill the paid first MCP round when a later step of the request fails

* fix(responses): log each MCP tool call under its own id so a failed follow-up keeps its spend row

The non-stream auto-execute path passed the request's call id to the tool call, so the tool's spend row and the request's failure row shared one request_id and the failure row was dropped on insert, leaving the paid first round unbilled.

* fix(responses): bill round 1 on a client disconnect, keep MCP tool rows in the request's session, and charge a fixed margin once per request

* fix(responses): keep bridged MCP auto-execute in one session and trace and continue its conversation

The bridged follow-up no longer chains on round 1, so a thinking model keeps its reasoning and the request stays in one session. The tool call log continues the request trace without renaming it, the tools are fetched once, and a later turn finds the MCP turn under the id the client got, skipping the tool rows.

* fix(responses): log the non-stream MCP tool listing in the request's session and trace

* fix(responses): find a bridged MCP turn by the id the client holds and log its listing in the bridged trace

* fix(responses): derive the MCP tool row id from the request's call id

The tool call's spend row now uses <call id>_<tool call id>, so it stays
linked to the request without colliding with the request's failure row.
Also tighten the internal cache-hit test to a fixed clock and typed params.

* fix(responses): bill a retried MCP attempt for its own rounds

A router retry or fallback reuses the request's logging object, so a failed attempt's stashed round 1 usage made the next attempt's success row log stale tokens. Each non-stream MCP attempt now starts without that stash.

* fix(responses): bill every failed MCP attempt's paid first round on the request failure

A retry or fallback now sets a failed attempt's stashed round 1 aside instead of dropping it, and the proxy's failure row adds it to the last attempt's own, so a request whose later attempt fails on its first call still bills the round the provider charged. A cached final round also keeps the paid first round's cost breakdown.

* fix(responses): keep MCP tool catalog and results out of the bridged next-turn replay

* fix(responses): keep MCP tool spend, client body keys, and Langfuse traces working on auto-execute

Count the MCP tools an auto-executed Responses API call ran in the tool spend rollup, accept a client body key named previous_response_client_ids without a 500, and point MCP listing and tool spans at the trace Langfuse gives the parent request, including x-litellm-session-id requests

* fix(responses): join MCP spans to the Langfuse trace when the request sends body metadata

* test(integration): cover non-stream MCP auto-execute billing, failure rows, and bridged follow-ups

---------

Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
2026-10-16 17:37:33 +00:00
..
__init__.py ci: move tests/proxy_unit_tests to tests/unit/proxy and run the proxy-db shards from litellm-tests (#42903) 2026-09-24 22:59:11 +00:00
test_background_interaction_settlement.py fix(interactions): keep background interaction bills through crashes, late restarts, and deployment keys (#45743) 2026-10-16 12:00:08 +00:00
test_baseline_accounting.py fix(router): preserve native baseline identity and accounting (#44960) 2026-10-07 11:00:31 -07:00
test_budget_reservation.py refactor(types): replace Any with proven types in 137 files (#44478) 2026-10-05 11:01:45 -07:00
test_budget_reservation_redis_failure.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_carried_budget_state.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_cloudzero_endpoints.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_compression_savings.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_input_tokens.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_key_metadata_recovery.py fix: cap cold MCP schema workers at usable CPUs and deflake wall-clock unit tests (#45791) 2026-10-15 00:47:59 -07:00
test_ptu_feature_flag.py feat(proxy): split Azure PTU deployments across teams with per-team PTU ceilings and PTU-hour reporting (#43043) 2026-10-15 18:44:30 +00:00
test_ptu_flat_cost_rollup.py feat(proxy): split Azure PTU deployments across teams with per-team PTU ceilings and PTU-hour reporting (#43043) 2026-10-15 18:44:30 +00:00
test_savings.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_search_api_logging.py refactor(proxy): expose public names for private proxy helpers (#45170) 2026-10-07 18:59:27 -07:00
test_spend_capture_rate.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_spend_counter_batch.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_spend_event.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_spend_event_producer.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_spend_log_error_logger.py test(proxy): move middleware, spend_tracking, pass_through, common_utils and root proxy tests into tests/unit/proxy (#44015) 2026-10-01 18:23:31 +00:00
test_spend_management_endpoints.py fix(proxy): scope /spend/tags aggregates to the caller's own and permitted-team logs (#46194) 2026-10-15 10:09:21 +02:00
test_spend_query_optimization.py fix(proxy): share ownership permissions for spend logs and traces (#44239) 2026-10-03 01:38:54 +00:00
test_spend_tracking_utils.py fix(responses): log and bill every round of non-stream MCP auto-execute (#43667) 2026-10-16 17:37:33 +00:00