Comparison · 2 options
Admux vs Gravity direct
Gravity’s own dashboard, API and MCP server buy its network with no minimum. Admux buys Gravity alongside ChatGPT and Google from one prepaid balance, and gives agents scoped keys with spending limits where Gravity’s key has full account access.
Side by side
Each cell is what that company publishes, with the source number. A dash means it isn’t published or doesn’t apply.
| Question | Admux | Gravity directly |
|---|---|---|
| Channels | ChatGPT ads, Google Search (including eligible AI placements) and the Gravity network[1] | An ad network for AI: brands reach people inside conversations with LLMs, agents, chatbots and AI search, and the host apps earn from the ads.[2] |
| Minimum | — | No minimum; start with any daily budget. A payment method is required before a campaign can launch.[3] |
| Price | Provider media cost plus a per-channel markup, shown in a price offer before you submit[1] | CPM (per 1,000 impressions), or CPA where the account allows it. No click (CPC) billing for new campaigns.[4] |
| Agent access | Scoped keys with daily, weekly, monthly and lifetime spending limits on new budget[5] | One key per account, no scopes, full access including spend.[6] |
| MCP server | MCP server over Streamable HTTP; tools filtered by the key’s scopes[7] | https://platform.trygravity.com/mcp; same API key; full admin access; actions run without confirmation; no spend limit.[8] |
| New campaigns start | Review before launch by default: approved legs wait for you unless a key with launch scope says otherwise[1] | active (draft and paused also allowed); docs warn active campaigns can spend.[9] |
| Creative | You supply it; Admux screens it against each channel’s rules and never generates ad content[1] | Generative (Gravity writes the ad per conversation from your context) or Static/manual (shown exactly as written).[10] |
Which fits you
Admux
- You want an agent to buy Gravity within a spending limit you set.
- You want Gravity plus ChatGPT and Google on one balance.
Gravity directly
- You only need Gravity and want to pay media cost with no markup.
- You want Gravity-written (generative) ads, which Admux doesn’t use.
Questions
Is Gravity’s MCP server safe to give an agent?
Gravity documents that its MCP server uses the same account key, with full admin access, no spending limit and actions that run without confirmation. That suits trusted automation; for an agent with a budget cap, use a scoped key such as Admux’s.
Sources
- Admux agents.txt: instructions for AI agentsAdmux · checked 10 Nov 2026
- Introduction - Gravity docsGravity docs · checked 10 Nov 2026
- AI Advertising FAQ | GravityGravity · checked 10 Nov 2026
- Overview - Gravity docsGravity docs · checked 10 Nov 2026
- Admux HTTP API guideAdmux · checked 10 Nov 2026
- Advertiser APIs - Gravity docsGravity docs · checked 10 Nov 2026
- Admux MCP server guideAdmux · checked 10 Nov 2026
- Dashboard MCP server for advertisers - Gravity docsGravity docs · checked 10 Nov 2026
- Campaigns (API reference) - Gravity docsGravity docs · checked 10 Nov 2026
- Campaigns - Gravity docsGravity docs · checked 10 Nov 2026
Comparisons use what each company publishes as of the date above. Admux is one of the options compared on some pages; we keep every cell to sourced facts.