Buffer vs Publer for AI agents
As of 12 Oct 2026, both reach L1 · Needs a person, and with each our agent was stopped at sign up (needs a human).
- Find: Some docs for agents: llms.txt and an MCP server.
- Access: Can't sign up.
- Use: Work not reached.
- Pay: Payment not reached.
- Leave: Leaving not reached.
Stopped at sign up: needs a human. Next: let an agent sign up on its own
Needs a person to get in: L1 · Needs a person. Sign-up stops our agent first, at auth.buffer.com, where clicking Sign Up shows a visible hCaptcha puzzle; no API or CLI route around it, so no account, no key, no verification mail. Buffer ships a GraphQL API, an official MCP server, a CLI and Markdown docs with agent setup guides, but without a key none of it could be driven: unauthenticated calls return 401. Pricing needs a card under Billing Method once a person is in; the trial-without-card claim from the FAQ was not confirmed. No checkout, cancel or delete path was reached.
Driven 6 Oct 2026 · The drive and its evidence- Find: Docs for agents: llms.txt, an OpenAPI and an MCP server.
- Access: Can't sign up.
- Use: Work not reached.
- Pay: Payment not reached.
- Leave: Leaving not reached.
Stopped at sign up: needs a human. Next: let an agent sign up on its own
Needs a person: a human must sign up and make the key before any API call. Our agent read the markdown docs and the llms.txt without trouble, then hit the sign-up form, where invisible reCAPTCHA escalated to a picture puzzle it could not pass. With no account, the key page, the first call and the official MCP server were never reached: both need a Business or Enterprise plan and a key made in the web UI, not an API route. Plans offer trials without a card, but checkout, cancel and delete were never tested, since the sign-up wall came first.
Driven 12 Oct 2026 · The drive and its evidenceThe two summaries: written and checked by our agents from each product's drive. How we write.
Where each one stops.
BufferStopped at sign up: needs a human
PublerStopped at sign up: needs a human
| Checkpoint | Buffer | Publer |
|---|---|---|
| Docs | Headless | Headless |
| Sign up | Needs a human | Needs a human |
| Verify | Not reached | Not reached |
| Key | Not reached | Not reached |
| First call | Not reached | Not reached |
| First action | Not reached | Not reached |
| Pay | Not reached | Not reached |
| Cancel | Not reached | Not reached |
| Delete | Not reached | Not reached |
Headless or in a browser.
How our agent passed each checkpoint, and what each product offers an agent.
Checkpoints by route, API, MCP, CLI and SDK
| Buffer | Publer | |
|---|---|---|
| Headless (checkpoints) | 1 | 1 |
| In a browser (checkpoints) | 0 | 0 |
| Needs a human (checkpoints) | 1 | 1 |
| Blocked (checkpoints) | 0 | 0 |
| Not tested (checkpoints) | 7 | 7 |
| Work done | Not measured | Not measured |
| API | Yes | Yes |
| OpenAPI | No | Yes |
| MCP server | Yes (official) | Yes (official) |
| CLI | Yes | No |
| SDK | No | No |
| llms.txt | Yes | Yes |
Bot checks, and where a person was needed.
| Buffer | Publer | |
|---|---|---|
| Bot check | hCaptcha stopped it at sign up, with a visible challenge | Google reCAPTCHA v2 (invisible) stopped it at sign up, with a visible challenge |
| Wall type | A challenge on the form | A challenge on the form |
| First wall | hCaptcha puzzle on the sign-up form | reCAPTCHA picture puzzle on sign-up |
| A person helped | No | No |
A challenge on the form: It asks every visitor to prove they are human. It stops every agent on any network, and a signature doesn't help: a person does this step, or the owner opens it for agents. Where we drive from.
Level and part scores.
| Buffer | Publer | |
|---|---|---|
| Level | L1 · Needs a person | L1 · Needs a person |
| Agent-ready setup | 75 of 100, fair | 90 of 100, good |
| Standards | MCP client registration (behind) | OpenAPI 3.1.1 (1 version behind) |
| Security | No review in this drive | Reported privately to the owner |
Holds up: not measured in these drives. Docs match is measured in an Audit. What the scores mean.
Pay, cancel and delete.
| Buffer | Publer | |
|---|---|---|
| Pay | Payment not reached | Payment not reached |
| Free plan or trial | Trial, no card | Trial, no card |
| Cancel | Not reached | Not reached |
| Delete the account | Not reached | Not reached |
How each one takes payment
- Buffer: Payment not reached.
- Publer: Payment not reached.
Buffer vs Publer: the short answers.
Which can an AI agent use, Buffer or Publer?
Both reach L1 · Needs a person, and with each our agent was stopped at sign up (needs a human). Driven 6 Oct 2026 (Buffer) and 12 Oct 2026 (Publer).
Can an AI agent sign up for Buffer and Publer on its own?
Buffer: no, needs a human. Publer: no, needs a human.
Do Buffer and Publer have an MCP server?
Buffer: yes (official). Publer: yes (official).
Can an AI agent delete its Buffer or Publer account?
Buffer: not reached. Publer: not reached.
The drives and the category.
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