---
title: "Query mempool for missing transactions"
method: POST
path: "/v2/mempool/query"
tags: ["Transactions"]
---

# Query mempool for missing transactions

`POST /v2/mempool/query`

Query the mempool for transactions that might be missing from the requesting node.
This endpoint supports pagination and streaming of transaction data.

## Query parameters

- `page_id` string

## Response `200`

Stream of missing transactions

## Other responses

- `400` — Bad request
- `500` — Internal Server Error

## Changes

- **2026-01-28** `30468ca2533f` — 1 breaking, 1 warning
  - the request's body minLength was increased from `0` to `1`
  - removed the request property `transactions`
- **2026-01-14** `f7f733b4a1fc` — 2 info
  - added the new optional request property `transactions`
  - the request's body minLength was decreased from `1` to `0`
- **2026-01-14** `eb2153a4a3ad` — 1 breaking, 1 warning
  - the request's body minLength was increased from `0` to `1`
  - removed the request property `transactions`
- **2026-01-02** `96224b968a3e` — 2 info
  - added the new optional request property `transactions`
  - the request's body minLength was decreased from `1` to `0`
- **2025-12-18** `97e7080a8130` — 1 breaking, 1 warning
  - the request's body minLength was increased from `0` to `1`
  - removed the request property `transactions`

[Full history](https://skmtc.dev/stacks-network/apis/stacks-3-0-rpc-api/changes/v2/mempool/query/post.md)

---

[API](https://skmtc.dev/stacks-network/apis/stacks-3-0-rpc-api.md) · [All operations](https://skmtc.dev/stacks-network/apis/stacks-3-0-rpc-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/stacks-network/stacks-3-0-rpc-api/revisions/bfe6e0b30f62/schema)