---
title: "Create an RHC first-touch subscription (ULTRA+)"
method: POST
path: "/rhc/kol/first-touches/subscriptions"
tags: ["Robinhood Chain"]
---

# Create an RHC first-touch subscription (ULTRA+)

`POST /rhc/kol/first-touches/subscriptions`

## Request

- Base URL: `https://madeonsol.com/api/v1`
- URL: `https://madeonsol.com/api/v1/rhc/kol/first-touches/subscriptions`
- Auth: HTTP bearer

Push the moment a token receives its **first** buy from a tracked KOL — the earliest signal available. A second KOL buying the same token produces nothing; dedup is structural (one first-touch row per token, ever).

**Filters are `.strict()`** — an unknown key is a 400, not a silently ignored filter. ⚠️ There is deliberately **no `min_scout_tier` / `min_n_touches`** as on Solana: RHC has no scout scoring, and a filter that silently matched nothing would be worse than its absence. `min_kol_winrate` and `strategy` are the quality gates instead. An unknown market cap is dropped by the MC band, never passed.

## Request body

- object
  - `name` string
  - `filters` object
    - `kol` string: Lowercase 0x EVM address
    - `min_first_buy_eth` number
    - `min_kol_winrate` number: Win-rate on CLOSED positions. A KOL who has never sold is unscored and is dropped, not treated as a loser.
    - `strategy` 'scalper' | 'day_trader' | 'swing' | 'inactive' | 'unscored'
    - `min_mc_usd` number
    - `max_mc_usd` number
  - `delivery_mode` 'websocket' | 'webhook' | 'both'
  - `webhook_url` string, uri

## Response `200`

Created — includes one-time webhook_secret.

- object
  - `chain` 'robinhood'
  - `subscription` object
    - `id` string, uuid
    - `name` string, nullable
    - `filters` object
      - `kol` string, nullable
      - `min_first_buy_eth` number, nullable
      - `min_kol_winrate` number, nullable
      - `strategy` 'scalper' | 'day_trader' | 'swing' | 'inactive' | 'unscored', nullable
      - `min_mc_usd` number, nullable
      - `max_mc_usd` number, nullable
    - `delivery_mode` 'websocket' | 'webhook' | 'both'
    - `webhook_url` string, uri, nullable
    - `is_active` boolean
    - `created_at` string, date-time
    - `updated_at` string, date-time
  - `webhook_secret` string, nullable: One-time HMAC secret — only present when webhook delivery is configured.
  - `note` string

## Other responses

- `400`: Invalid body, unknown filter key, or MC band inverted.
- `401`: Missing or invalid API key, or an expired free-tier key. Authentication-stage error: no `X-RateLimit-*` headers, no `_rid`.
- `403`: Forbidden. One of: the key's tier is below this endpoint's or parameter's gate (`tier_required` with an `upgrade` block); the public demo key used outside its allow-list (`demo_key_endpoint_not_allowed`); an invalid or revoked key; an origin-restricted key called from a disallowed origin (`code` `origin_not_allowed` / `origin_required`). `X-RateLimit-*` headers are present only on `tier_required`.
- `409`: RHC first-touch subscription limit reached for the tier.
- `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)