Plain vs Zendesk for AI agents
As of 6 Oct 2026, both reach L1 · Needs a person, and our agent got as far with each: with Plain it was stopped at sign up (needs a human), with Zendesk it was stopped at sign up (blocked).
- 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
Docs answer our agent on their own: llms.txt, markdown pages, a public GraphQL schema, SDK, CLI and an official OAuth MCP server. Sign-up does not. L1 · Needs a person: our agent gets in on its own nowhere. It stopped at signup, where a visible Cloudflare Turnstile challenge sits on the page. The email sign-in path answered "Access blocked, please contact support." With no human to hand over a workspace, no key, call or action followed. Core-api returned Unauthorized with no credentials. Paying and leaving are graded from docs only: a trial without a card and plan changes by API, since no account ever started.
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: blocked. Next: let an agent sign up on its own
Needs a person to sign up: L1 · Needs a person. Our agent stopped at the trial form, which demands a phone number its identity doesn't have; the reseller accounts API is the only other path in, and it needs a reseller-only token plus a phone too. No bot check appeared. Discovery is decent: a full OpenAPI reference and an official per-account MCP server with a server card, though still on the older MCP spec with DCR-only OAuth. Buy-now links lead back to the same phone-gated form, so paying needs a person as well.
Driven 6 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.
PlainStopped at sign up: needs a human
ZendeskStopped at sign up: blocked
| Checkpoint | Plain | Zendesk |
|---|---|---|
| Docs | Headless | Headless |
| Sign up | Needs a human | Blocked |
| 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
| Plain | Zendesk | |
|---|---|---|
| Headless (checkpoints) | 1 | 1 |
| In a browser (checkpoints) | 0 | 0 |
| Needs a human (checkpoints) | 1 | 0 |
| Blocked (checkpoints) | 0 | 1 |
| 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 | Yes |
| SDK | Yes | No |
| llms.txt | Yes | Yes |
Bot checks, and where a person was needed.
| Plain | Zendesk | |
|---|---|---|
| Bot check | Cloudflare Turnstile (managed challenge) stopped it at sign up, with a visible challenge | None met |
| Wall type | A check of our network and browser | No bot-check wall |
| First wall | Cloudflare Turnstile on the sign-up page | Phone number required on trial sign-up |
| A person helped | No | No |
A check of our network and browser: It judged where our agent connects from and its browser, not a person. An agent that works on its own from a data center doesn't get through unless the owner lets signed agents in. How agents in a person's own browser fare isn't measured yet. Where we drive from.
Level and part scores.
| Plain | Zendesk | |
|---|---|---|
| Level | L1 · Needs a person | L1 · Needs a person |
| Agent-ready setup | 75 of 100, fair | 100 of 100, good |
| Standards | MCP client registration (current) | MCP client registration (behind) · OpenAPI 3.0.3 (2 versions behind) |
Holds up: not measured in these drives. Docs match is measured in an Audit. What the scores mean.
Pay, cancel and delete.
| Plain | Zendesk | |
|---|---|---|
| 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
- Plain: Payment not reached.
- Zendesk: Payment not reached.
Plain vs Zendesk: the short answers.
Which can an AI agent use, Plain or Zendesk?
Both reach L1 · Needs a person, and our agent got as far with each: with Plain it was stopped at sign up (needs a human), with Zendesk it was stopped at sign up (blocked). Both driven 6 Oct 2026.
Can an AI agent sign up for Plain and Zendesk on its own?
Plain: no, needs a human. Zendesk: no, blocked.
Do Plain and Zendesk have an MCP server?
Plain: yes (official). Zendesk: yes (official).
Can an AI agent delete its Plain or Zendesk account?
Plain: not reached. Zendesk: not reached.
The drives and the category.
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