---
title: "Add a Robinhood Chain wallet to your watchlist (PRO+)"
method: POST
path: "/rhc/wallet-tracker/watchlist"
tags: ["Robinhood Chain"]
---

# Add a Robinhood Chain wallet to your watchlist (PRO+)

`POST /rhc/wallet-tracker/watchlist`

## Request

- Base URL: `https://madeonsol.com/api/v1`
- URL: `https://madeonsol.com/api/v1/rhc/wallet-tracker/watchlist`
- Auth: HTTP bearer

Addresses are stored lowercase so they match `rhc_trades.trader_eoa`; a checksummed `0xAbC…` would otherwise join to nothing and look like a permanently silent wallet. Tier: **PRO+**.

## Request body

- object
  - `wallet_address` string, required
  - `label` string

## Response `201`

Added.

## Other responses

- `400`: Invalid EVM address or JSON body.
- `401`: Missing or invalid API key, or an expired free-tier key. Authentication-stage error: no `X-RateLimit-*` headers, no `_rid`.
- `403`: Requires Pro or Ultra tier.
- `409`: Wallet already in watchlist, or the per-tier RHC limit is reached.
- `429`: Too many requests. Every 429 carries `Retry-After`. A quota 429 (`rate_limit_exceeded`, with `X-RateLimit-*`), a heavy-query concurrency 429 (`error_kind` `concurrency`/`capacity`), or the per-IP authentication-failure block (30 failed auths/min; plain `error` + `retry_after_seconds`, no `X-RateLimit-*`).
- `500`: Unexpected server error from the route (`Internal server error`, with `_rid`). Safe to retry with backoff. A failed API-key lookup is a 503 `auth_backend_unavailable`, never a 500.
- `503`: The API-key or subscription lookup could not be answered (authentication stage). Retryable and not your fault: it is never counted as a failed authentication. Honour `Retry-After`; no `X-RateLimit-*`, no `_rid`.

---

[API](https://skmtc.dev/madeonsol/apis/madeonsol-robinhood-chain-api.md) · [All operations](https://skmtc.dev/madeonsol/apis/madeonsol-robinhood-chain-api/llms.txt) · [OpenAPI document](https://skmtc.dev/madeonsol/apis/madeonsol-robinhood-chain-api/revisions/9ea9a35ee2bf?raw)