---
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

- **2025-12-15** `d7bba78bfcac` — 2 info
  - added the new optional request property `transactions`
  - the request's body minLength was decreased from `1` to `0`
- **2025-12-04** `46bc74e5bab3` — 1 breaking, 1 warning
  - the request's body minLength was increased from `0` to `1`
  - removed the request property `transactions`
- **2025-07-09** `04a9a0b50aa3` — 1 info
  - endpoint added
- **2025-07-08** `488dd3b80020` — 1 breaking
  - api path removed without deprecation
- **2025-07-08** `170414634c90` — 1 info
  - endpoint added

[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/d7bba78bfcac/schema)