okx-affiliate-mcp

name	okx-affiliate-mcp
description	Install and maintain the OKX Affiliate MCP (OAuth) on Hermes Agent.
version	1.0.0
author	Community
license	MIT
metadata	{"hermes":{"tags":["MCP","OAuth","OKX","Affiliate","Integrations"],"related_skills":["native-mcp"]}}

OKX Affiliate MCP for Hermes Agent

Install, authorize, and keep alive the OKX Growth Affiliate MCP (https://www.okx.com/api/v1/mcp/growth-affiliate-mcp) on Hermes Agent.

After install, Hermes exposes 6 tools (named mcp_okx_affiliate_*):

• okx-affiliate-performance-summary
• okx-affiliate-invitee-list
• okx-affiliate-invitee-detail
• okx-affiliate-link-list
• okx-affiliate-sub-affiliate-list
• okx-affiliate-co-inviter-list

See reference/tools-overview.md for what each one returns.

When to use this skill

Load this skill when the user asks to:

• "Install / set up / connect OKX Affiliate MCP on Hermes"
• "Refresh / renew the OKX Affiliate token"
• "Fix 401 Unauthorized from mcp_okx_affiliate_* tools"
• "Set up cron / automatic refresh for the OKX Affiliate MCP"

Why a skill (not a native MCP entry)

The OKX MCP is a remote HTTP MCP with two OAuth quirks that no MCP client currently handles out of the box:

1. Mandatory resource parameter (RFC 8707) on every authorize and token request — omitting it returns invalid_grant: resource does not match.
2. Non-discovery Dynamic Client Registration endpoint at /api/v5/mcp/auth/register — not advertised by .well-known.

Hermes Agent's native-mcp client supports static HTTP headers but does not run an OAuth flow. This skill runs the flow with four small stdlib-only Python scripts (adapted from the upstream okx/growth-affiliate-tool repo) and writes the resulting bearer token straight into ~/.hermes/config.yaml. Hermes hot-reloads mcp_servers on config change, so the MCP appears within seconds — no restart needed.

State files

All credentials live under ~/.hermes/data/okx-affiliate-mcp/ (gitignored):

File	Content	Written by
client.json	DCR-registered client (client_id, redirect_uris, …)	register.py
pkce.json	code_verifier, code_challenge, state for this auth	auth.py
auth_url.txt	URL the user must open in a browser	auth.py
token.json	access_token, refresh_token, expires_in, obtained_at	exchange.py / refresh.py

The bearer token in token.json is also mirrored into ~/.hermes/config.yaml inside a managed block delimited by:

# >>> okx-affiliate-mcp managed block — do not edit by hand >>>
... mcp_servers entry ...
# <<< okx-affiliate-mcp managed block <<<

write_config.py only touches text between those two markers; everything else in config.yaml is preserved byte-for-byte.

Decision tree

When invoked, always start by running:

python3 SKILL_DIR/scripts/status.py

Branch on the printed state:

state: ok                       → already installed and token valid; you are done
state: expiring_soon | expired  → run scripts/auto_refresh.py (one shot)
state: not_installed            → Fresh install (steps 1–4)
state: registered_but_unauthed  → resume from Step 2 (auth.py)
state: token_malformed          → resume from Step 2 (auth.py)

Fresh install (4 steps)

Replace SKILL_DIR with the absolute path to this skill's directory (the directory containing SKILL.md).

Step 1 — Register a DCR client (one-time)

python3 SKILL_DIR/scripts/register.py

Writes client.json. Idempotent — safe to re-run.

Step 2 — Generate authorize URL

python3 SKILL_DIR/scripts/auth.py

Prints the URL and saves it to auth_url.txt. Send the URL to the user.

⚠ Before the user clicks Authorize, tell them — explicitly, in plain language — what to expect:

After clicking Authorize, your browser will try to load http://localhost:8787/callback... and you'll see a blank / "site can't be reached" page. That blank page is the success state. Do not reload or close the tab. Just copy the entire URL from the browser's address bar (it contains code=...&state=...) and paste it back.

On the consent page they should only enable Live Trading → Read-only. Everything else off. See reference/blank-callback-page.md for the full walkthrough.

Step 3 — Exchange code for token

python3 SKILL_DIR/scripts/exchange.py "<callback-url-or-code>"

Accepts either the bare code value or the full callback URL. Verifies state against pkce.json, exchanges the code, writes token.json.

Step 4 — Inject token into Hermes config

python3 SKILL_DIR/scripts/write_config.py

Adds (or replaces) the managed mcp_servers.okx_affiliate block in ~/.hermes/config.yaml. Hermes will hot-reload within ~3 seconds.

If config.yaml already has a top-level mcp_servers: key

YAML disallows two top-level mcp_servers: keys. write_config.py will bail with a clear error. Either:

• merge our entry under the existing block manually (copy the snippet it prints), or
• comment out the existing block before re-running write_config.py and re-add your other servers inside the managed region.

Step 5 — Verify

Ask Hermes to call the MCP:

Show me my affiliate performance summary.

Hermes should call mcp_okx_affiliate_okx_affiliate_performance_summary and return a numeric payload. If you see 401 Unauthorized, run scripts/auto_refresh.py and retry.

Refresh (existing install)

python3 SKILL_DIR/scripts/auto_refresh.py

This is refresh.py + write_config.py in one shot:

1. POSTs grant_type=refresh_token to OKX (with the mandatory resource parameter).
2. Overwrites token.json with the new access_token + refresh_token + obtained_at.
3. Rewrites the managed block in ~/.hermes/config.yaml.
4. Hermes hot-reloads the MCP within seconds.

If refresh.py fails (refresh_token is dead), fall back to a fresh login — auth.py → exchange.py → write_config.py. client.json is still valid, so you can skip register.py.

Automatic refresh (cron)

access_token lives ~1 hour. To keep it valid without LLM involvement, register a cron job that runs auto_refresh.py every 50 minutes. Two options:

Option A — Hermes built-in cron (recommended)

Use the cronjob tool inside Hermes:

schedule: "*/50 * * * *"
prompt:   "Run: python3 ~/.hermes/skills/<category>/okx-affiliate-mcp/scripts/auto_refresh.py"

(Replace <category> with wherever the skill is installed. If you cloned this repo into ~/.hermes/skills/okx-affiliate-mcp/, no category prefix needed.)

Option B — system crontab

*/50 * * * * /usr/bin/python3 /home/USER/.hermes/skills/okx-affiliate-mcp/scripts/auto_refresh.py >/dev/null 2>&1

Either option keeps config.yaml's bearer token always fresh; the agent never sees a 401.

On-demand refresh (no cron)

If you skip cron, the LLM can recover from a 401 the OpenClaw way: when any mcp_okx_affiliate_* tool returns 401 / "token expired", load this skill and run scripts/auto_refresh.py, then retry the original call. Hermes hot-reloads MCP within a few seconds; if the retry still 401s, sleep ~3 seconds and try once more.

Critical pitfalls (read before debugging)

• resource parameter — required on both the authorize request and the token request, and the refresh request. invalid_grant: resource does not match always means this is missing.
• DCR endpoint is /api/v5/mcp/auth/register, not the discovery default.
• Token endpoint is /api/v5/mcp/auth/token.
• Authorize page needs the flow=code query param — without it OKX may serve a different UI.
• User-Agent — OKX is behind Cloudflare; Python-urllib/3.x gets a 403 error code: 1010. Scripts already send a browser-ish UA.
• Scope — keep live:read unless the user has a real need; broader scopes alarm the user on the consent screen and are not used by this MCP.
• Config YAML duplicate key — if there's a top-level mcp_servers: block outside our managed region, write_config.py will refuse to write (see Step 4 above).

See reference/oauth-endpoints.md and reference/known-issues.md for full specs and historical bugs.

Uninstall

rm -rf ~/.hermes/data/okx-affiliate-mcp
# Then delete the managed block between BLOCK_BEGIN/BLOCK_END markers in
# ~/.hermes/config.yaml. Hermes will hot-reload and drop the MCP.

To also revoke OAuth access, sign in to OKX → Connected apps and remove the entry there.

Credits

OAuth scripts adapted from okx/growth-affiliate-tool (MIT). Hermes-specific glue (status, write_config, auto_refresh) added for this skill.