Hermoso is a marketing MCP server: 922+ tools over one OAuth’d endpoint that let an agent research the ads already running in a market, generate finished image and video ads, publish them, and build the paid campaigns behind them. OpenClaw reaches all of it through one connection. This page covers one slice of that: what OpenClaw can actually do on Pinterest, and what Pinterest will not let it do.
Connect Hermoso to OpenClaw
- Install and sign in.
Your browser opens once. Nothing to create and nothing to paste: the credential is stored owner-only innpm install -g hermoso && hermoso auth login~/.hermoso/config.json. On a machine with no browser,hermoso auth login --token hmk_…takes a key from MCP & CLI → Terminal & API keys instead. - Add it to
~/.openclaw/openclaw.json. No key goes in the file, becausehermoso mcpreads the sign-in above:{ "mcp": { "servers": { "hermoso": { "command": "npx", "args": ["-y", "hermoso", "mcp"] } } } } - Ask your agent for something. “Pull my three closest competitors’ longest-running ads and remix the best hook into a 9:16 video,” or “post this render to the channel.” The agent picks the tools; you approve the spend.
Hermoso has no special relationship with OpenClaw and does not claim one. The shape above is quoted from OpenClaw's own MCP reference at docs.openclaw.ai/cli/mcp, read on 2026-08-23; it is documented rather than run here, which is why it is the published file shape and not a bespoke install command.
Then connect Pinterest itself, once, under Settings → Connectors in Hermoso. That is an OAuth consent screen, so it is the one step that needs a browser. Everything after it is a tool call.
The Pinterest tools OpenClaw gets
list_pinterest_boards: the account’s boards, including secret ones, with their ids.create_pinterest_board: makes a new board.post_to_pinterest: creates an image or video Pin on a board you name, with a title, a description, a destination link and alt text.schedule_post: queues the Pin, carryingboardId.list_pinterest_ads_campaigns / pinterest_ads_report: read the paid side.
The limit you need before you plan a Pinterest workflow: this app holds Trial access, and Pinterest refuses Pin creation in production on Trial. Their words, caught on the first real Pin: “Apps with Trial access may not create Pins in production.” Boards and reads do work on Trial (listing boards, creating boards, reading Pins), and Hermoso’s error names the access tier rather than telling you to reconnect, because reconnecting cannot fix it. An upgrade to Standard access is what unblocks Pin creation, and it is pending review. The same tier limits the paid side: on Trial, Pinterest exposes no ad accounts at all.
Pinterest limits worth knowing before you automate anything
| Text | A Pin description is capped at 800 characters and a Pin title at 100. It is enforced when the post is created or queued, so an overlong post is refused while you are still there to fix it instead of being silently cut on the way out. |
|---|---|
| Visibility | Public, and the control is the board rather than the Pin. A Pin inherits its board’s public or secret state, so “post it somewhere private” is expressed by choosing a secret board. That is why the board is a required argument rather than a default. |
| Carousel | 2 to 5 images, images only. Both bounds come straight from Pinterest’s own v5 OpenAPI (minItems: 2, maxItems: 5), which is the only machine-readable source Pinterest publishes (their developer site is a client-rendered app that returns nothing to a fetch). There is no multi-video source, so a video slide is refused rather than dropped. |
| Which account | boardId, and it is the only identity field refused at enqueue rather than at publish time. Leave it out and nothing is scheduled, because “a Pin on the wrong board is a public mistake, so we never choose one for you.” |
Try it in OpenClaw
Ask for it in ordinary language. These are plain sentences, not a DSL:
“For each new product this week, generate a vertical Pin image with a title and description and stage it against the right board.”
That walks list_pinterest_boards → plan_ad → generate_image → post_to_pinterest. How much a run asks you is OpenClaw’s setting, not ours.
OpenClaw on Pinterest: the part that bites
Do not point a retry loop at Pin creation. Pinterest refuses it in production for apps on Trial access. That is an access tier, not a transient failure, and Hermoso's error names the tier so an agent can tell the difference. Boards and reads work, so staging the whole set is real work that survives until Standard access lands.
On a long autonomous loop the hermoso CLI is the token-cheap path, because the agent shells out per command instead of carrying an 922+ tool manifest through every turn.
Research Pinterest before you post
There is no Pinterest ad library, so competitor research on Pinterest is not something Hermoso claims. The creative you would run there is well covered by the rest of the studio: make_template_ad and the image models produce the vertical, text-forward stills the surface rewards.
The paid half
Pinterest Ads tools exist for a campaign, an ad group and an ad that promotes an existing Pin, with archiving instead of deleting, because Pinterest’s ADS API has no delete verb (organic Pins and boards do delete, through delete_pinterest_pin and delete_pinterest_board; it is the paid objects that can only be archived). But the same Trial-access tier that blocks Pin creation exposes no ad accounts, so ad writes are not usable until Standard access lands. That is the honest state, and it is better in a sentence here than discovered on a deadline.
What OpenClaw cannot do on its own
An agent with a budget is only useful if the blast radius is bounded, so the fence is in the server rather than in a prompt. Every ad campaign, ad set, ad group and ad is created paused, and the status switches that arm real money refuse to run without an explicit confirmation flag. Every render is quoted first (hermoso_capabilities publishes each model’s exact credit cost before anything spends). Credits are reserved before the first provider call and settled at the exact cost afterwards, so a failed dispatch refunds rather than leaving you billed for nothing. Deletes are confirm-gated too, and every campaign tree is read back from the ad platform before your agent tells you what it built.
One step is deliberately not headless: linking an account is an OAuth consent screen, so you connect the channel once in a browser. Everything after that is a tool call.
The rest of the matrix
From OpenClaw, post to: Facebook · Instagram · Threads · TikTok · YouTube · X · LinkedIn · Bluesky · Telegram. Or see everything OpenClaw can publish to.
Post to Pinterest from: Claude · ChatGPT · Claude Code · Cursor · Codex · Cline · Grok Bot · Hermes · Gemini CLI · Perplexity · Le Chat · Claude Cowork · Perplexity Computer · Paperclip
Frequently asked questions
Can OpenClaw post to Pinterest?
Yes, through Hermoso's MCP server. Run npm install -g hermoso && hermoso auth login, then add hermoso under mcp.servers in ~/.openclaw/openclaw.json with command npx and args -y hermoso mcp. The browser sign-in stores the credential, so no key goes in the file. OpenClaw then has 922+ tools, including the ones that publish to Pinterest, plus the ones that research the ads already running in your market and render the creative in the first place.
How do I connect Pinterest to OpenClaw?
Two steps, once each. Run npm install -g hermoso && hermoso auth login, then add hermoso under mcp.servers in ~/.openclaw/openclaw.json with command npx and args -y hermoso mcp. The browser sign-in stores the credential, so no key goes in the file. Then connect Pinterest inside Hermoso under Settings → Connectors, which is an OAuth consent screen in a browser. After that OpenClaw publishes to Pinterest as an ordinary tool call.
Can OpenClaw post a carousel to Pinterest?
Yes in principle: 2 to 5 images, images only, straight from Pinterest’s own v5 OpenAPI. In practice Pin creation itself is blocked in production while this app holds Trial access. OpenClaw calls the same publish tool either way, and a channel that cannot carry a carousel is refused with the real reason attached.
Can OpenClaw schedule a Pinterest post for later?
Yes. schedule_post queues it on one calendar shared with every other channel, with a per-channel caption if the copy should differ, and list_scheduled and cancel_scheduled read and pull it back. Pinterest is one of the eleven channels that queue.
Does OpenClaw need my Pinterest password?
No. You connect Pinterest to Hermoso once through an OAuth consent screen in a browser, and OpenClaw then reaches it as a tool call. Linking an account is the one step that is not headless; nothing after it needs a password, and no credential is ever handed to the model.
What does it cost to post to Pinterest from OpenClaw?
Pinterest charges nothing per API call, so publishing costs no credits. Credits are spent generating the Pin creative. Plans are $29, $69 and $149 a month for 1,200, 3,000 and 7,000 credits, and every feature is on every plan including Free. The only exception is enterprise SSO.
Start free with 30 credits at signup and 250+ more to earn. Every feature is on every plan. Credits are spent only on AI models and Ad Spy research; posting, scheduling, ads management and analytics are free.
Start free → See pricing