# Signers

Endpoints for retrieving signer information.

## Fetch the stacker and signer set information for a given cycle.

> Used to get stacker and signer set information for a given cycle.\
> \
> This will only return information for cycles started in Epoch-2.5\
> where PoX-4 was active and subsequent cycles.<br>

```json
{"openapi":"3.1.0","info":{"title":"Stacks 3.0+ RPC API","version":"1.0.0"},"tags":[{"name":"Signers","description":"Endpoints for retrieving signer information."}],"servers":[{"url":"http://localhost:20443","description":"Local Stacks Node"},{"url":"https://api.mainnet.hiro.so","description":"Stacks Mainnet API"},{"url":"https://api.testnet.hiro.so","description":"Stacks Testnet API"}],"security":[],"paths":{"/v3/stacker_set/{cycle_number}":{"get":{"summary":"Fetch the stacker and signer set information for a given cycle.","tags":["Signers"],"operationId":"getStackerSet","description":"Used to get stacker and signer set information for a given cycle.\n\nThis will only return information for cycles started in Epoch-2.5\nwhere PoX-4 was active and subsequent cycles.\n","parameters":[{"name":"cycle_number","in":"path","required":true,"description":"reward cycle number","schema":{"type":"integer"}},{"name":"tip","in":"query","schema":{"type":"string","pattern":"^(latest|[0-9a-f]{64})?$","maxLength":64},"description":"Stacks chain tip to query from. Options:\n- (empty/omitted): Use latest anchored tip (canonical confirmed state)\n- `latest`: Use latest known tip including unconfirmed microblocks\n- `{block_id}`: Use specific block ID (64 hex characters)\n"}],"responses":{"200":{"description":"Information for the given reward cycle","content":{"application/json":{"schema":{"type":"object","properties":{"stacker_set":{"type":"object","required":["rewarded_addresses","start_cycle_state"],"properties":{"rewarded_addresses":{"type":"array","description":"Reward addresses that will receive PoX rewards for the cycle.","items":{"type":"object","description":"PoX address object with serialization details (see SIP-007).","properties":{"Standard":{"type":"array","description":"Standard address representation.","items":{"oneOf":[{"type":"object","properties":{"bytes":{"type":"string","description":"Hex-encoded 20-byte address payload"},"version":{"type":"integer","description":"Address version byte"}}},{"type":"string","description":"Serialization method (e.g., \"SerializeP2PKH\")"}]}}},"additionalProperties":true}},"signers":{"type":"array","description":"Optional signer set for PoX-4 reward cycles.","items":{"type":"object","properties":{"signing_key":{"type":"string","description":"Hex-encoded compressed Secp256k1 public key (33 bytes)"},"weight":{"type":"integer","description":"Signer voting weight (number of slots)"},"stacked_amt":{"type":"integer","format":"int64","description":"Amount stacked by signer (in microSTX)"}}}},"start_cycle_state":{"type":"object","properties":{"missed_reward_slots":{"type":"array","description":"Principals that missed reward slots at cycle start.","items":{"type":"object"}}}},"pox_ustx_threshold":{"type":"integer","format":"int64","description":"Minimum STX amount required to qualify for stacking (optional)"}}}}}}}},"400":{"description":"Could not fetch the given reward set","content":{"application/json":{"schema":{"type":"object","required":["response","err_msg"],"properties":{"response":{"type":"string","enum":["error"],"description":"Response status"},"err_type":{"type":"string","description":"Error type classification"},"err_msg":{"type":"string","description":"Detailed error message"}}}}}},"404":{"description":"Reward cycle not found or does not exist","content":{"text/plain":{"schema":{"type":"string"}}}}}}}}}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.stacks.co/reference/api/stacks-node-rpc/signers.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.