Placid API + MCP by Placid

# Fix list: Placid API + MCP

From Anchor Terminal's listing at https://www.anchorterminal.com/tools/placid, the October 2026 research run, assessed 1 October 2026. Grade E, 43.2 out of 100.

This is everything the published grade says the listing lacks, the biggest possible gain to the total first. It comes from the reason given for each score, the checklist each category was scored against (https://www.anchorterminal.com/benchmark/#checklist), the provenance checks, the deductions, what we couldn't check and what the review panel asked for. A fix counts at the next check, once it's public.

For a coding agent working on Placid API + MCP: work through the items below in the product, its docs and its public pages. Each category gives the reason for its score, with the points each checklist item earned, and the checklist itself, so the gap is the items that earned less than their points. Change the product, not the wording, and keep a note of what you changed and where it's published.

## 1. Security & auth, 34 out of 100, up to 11.6 more on the total

Why it scored 34: One bearer token per project, no scopes, and the docs say nothing on revoking or rotating it (15). The MCP setup guide documents ?api_token= in the server URL for clients that can't set headers, less 10 (5). MCP settings restrict which templates and which output types (image, PDF, video, docs only) the server can use (14). Returns renders from your own templates (10). A dashboard activity log is mentioned in the changelog, nothing per call documented (5). No security.txt (404), no certification in the privacy policy and no disclosure policy found (0).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-security):

- 0 to 30, the credential model. 30 for OAuth 2.1 with scopes, or scoped and revocable keys with rotation. 20 for plain revocable API keys. 10 for one all-powerful key. 10 off when a secret can travel in a URL query string as a documented option.
- 0 to 20, read-only or least-privilege modes, and confirmation or approval for destructive actions.
- 0 to 15, prompt-injection posture where the tool returns untrusted content (documented mitigations or guidance). A tool that returns no untrusted content gets 10.
- 0 to 15, audit logs or per-call visibility for the operator.
- 0 to 20, a security programme. security.txt or a disclosure policy, a bug bounty, SOC 2 or ISO 27001, advisories handled in public.

Models are read for retention, whether API data trains models (and whether that's off by default), zero-retention options and certifications. Frameworks for telemetry defaults, approval hooks, guardrails and sandboxing.

## 2. Schema & documentation, 34 out of 100, up to 10.7 more on the total

Why it scored 34: No OpenAPI or other machine-readable contract, and the MCP tool definitions aren't published (0). /llms.txt returns 404 (0). Endpoint pages state purpose and warn that create_now may fail under high load (12). template_uuid is the one required field and status is an enum, but `layers` and `modifications` are open objects keyed by layer name (8). Request and response examples per endpoint, and an error page with six codes but no body format (9). Docs are versioned 2.0, but the changelog on Headway carries no dates and its newest entries predate the MCP server (5).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-schema):

APIs and MCP servers.

- 25, a machine-readable contract (a public OpenAPI file or similar; for MCP, typed JSON Schema inputs on every tool).
- 10, llms.txt or Markdown docs served for agents.
- 0 to 20, descriptions that say what a tool is for, when to use it and when not to, read from the tool definitions in the source or the API reference.
- 0 to 15, typed inputs with enums, constraints and required fields, and no free-form JSON blobs.
- 0 to 15, examples and documented error responses.
- 15, versioning and a public changelog.

Models are read from the API reference, the OpenAPI file, llms.txt, the structured-output and tool-use docs and the model cards. Frameworks from docs a model can follow, typed interfaces, examples and the API reference.

## 3. Agent ergonomics, 40 out of 100, up to 9.8 more on the total

Why it scored 40: Image, PDF and video objects are small and the MCP can be limited to chosen templates and creative types (15). We found no pagination or filter parameters on the pages we read (5). Six status codes documented without an error body format (10). No idempotency key, no MCP tool annotations we could see, and DELETE removes an image for good. Polling the polling_url is safe (3). Only template_uuid is required, but the official libraries are PHP and Laravel only, both last tagged v1.0.1 on 2022-07-20 (7).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-ergonomics):

- 0 to 25, context cost. For MCP, the number and size of the tool definitions (25 for ten or fewer compact tools, 15 for 11 to 30, 5 for more than 30, plus up to 10 back for toolsets, dynamic loading or read-only subsets). For APIs, whether responses can be sized (field selection, limits, summaries).
- 20, pagination, filtering and output-size controls.
- 20, actionable, documented error responses, codes and messages an agent can recover from.
- 20, idempotency or safe retries, and for MCP the `readOnlyHint` and `destructiveHint` annotations.
- 15, sensible defaults, few required parameters, and official SDKs in at least two languages.

Models are read for tool use, structured output, prompt caching, context length, batch and SDKs. Frameworks for how much code and how many defaults a tool-calling agent with MCP needs.

## 4. Payments & pricing, 35 out of 100, up to 8.1 more on the total

Why it scored 35: No x402, MPP or L402 (0). Plan prices are public per the 30 September check (our fetch of the pricing page didn't render the amounts), and the FAQ states credit costs per unit, 1 per image, 2 per PDF page and 10 per 10 seconds of video (15). Free trial with no card and unlimited watermarked previews in test mode (20). A person signs up in a browser and copies a project token (0).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-payments):

The published rubric, also on the [x402 page](https://www.anchorterminal.com/x402/).

- 40, a machine payment protocol (x402, MPP or L402) on the tool's own endpoints. 10 to 30 when it covers only some endpoints or only goes through a third party, and the note says which.
- 20, per-call or per-unit pricing published without a login. 10 for public plan-only pricing, 0 for "contact sales" or prices behind a login.
- 20, a free tier or trial that doesn't need a card.
- 20, autonomous onboarding, meaning an agent can get access without a person signing up in a browser (keyless use, x402, a programmatic key API).

Payment platforms and agent wallets rarely charge for their own API over a machine protocol, so the first line has steps for them, and the highest one that applies counts. 40 when x402, MPP or L402 runs on all their own endpoints, 30 when it runs on part of their own API, 25 when their merchants can accept one, 20 for running a facilitator, 15 for paying as a buyer, and 0 when the only protocol is their own. Merchant acceptance sits above a facilitator because the platform's own customers can charge agents through it, while a facilitator settles for sellers who wire up the protocol themselves. The counter-argument (a facilitator does more for the protocol as a whole) has a point. Each note says which step applied.

Open-source software you run yourself is scored on its hosted or paid option if it has one. A free, self-hosted package with nothing to buy gets 20, 20 and 20 for the last three lines, and 0 to 40 for the first only if it ships a payment protocol.

## 5. Maintenance & community, 7 out of 100, up to 8.1 more on the total

Why it scored 7: We found no dated release or API change. The Headway changelog has no dates, its entries mention Integromat and a v2.0 launch, and /changelog on placid.app returns 404 (0). No dated entries in the last 90 days (0). Support by email named in the error docs, public changelog stale (4). Official PHP and Laravel libraries were last tagged v1.0.1 on 2022-07-20 and still call placid.app/api/rest (3). No CI on either library (0).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-maintenance):

- 0 to 30, time since the last release, or the last published model or API change for a closed service. 30 within 30 days, 20 within 90, 10 within 180, 0 older.
- 20, at least three releases or dated changelog entries in the last 90 days.
- 0 to 25, responsiveness. Issues and pull requests answered on GitHub (the open issues and how recent the replies are). For closed services, a public changelog and a support or community channel that answers, 0 to 15.
- 15, presence in the official MCP registry under a verified namespace (MCP servers), or current official SDKs (APIs and models).
- 10, package health, current dependencies and CI.

Models are read for deprecation notice periods and model churn rather than release counts.

## 6. Reliability, 75 out of 100, up to 5 more on the total

Why it scored 75: Hyperping status page at status.placid.app with separate App and API components and 90-day bars (20). No incidents are posted. The page's own figure for the API is 99.963 per cent over 90 days, roughly 48 minutes of recorded downtime with no write-up, so minor rather than clean (20). 60 requests a minute and 10 simultaneous create_now requests, documented (15). X-RateLimit-Limit, -Remaining and -Reset headers and exponential backoff advice on 429, but no idempotency key or safe-retry note for renders, which are writes (10). No SLA found on the pricing page or in the docs (0). REST API 2.0 is GA (10).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-reliability):

Hosted APIs, MCP servers, models and platforms.

- 20, a public status page with component history (Statuspage, Instatus, BetterStack or the vendor's own).
- 0 to 30, the incident record for the last 90 days on that page. 30 for a clean record or trivial incidents only, 20 for minor incidents only, 10 for one major outage (an hour or more of a core API down, or errors across the board), 0 for several. 5 when there's no history we could read, and the note says so.
- 15, rate limits documented with numbers.
- 15, documented 429 or overload handling (Retry-After, backoff guidance), and idempotency keys or safe-retry guidance where writes are involved.
- 10, an SLA published for any paid tier.
- 10, the surface agents use is generally available, not beta or preview.

Local packages, SDKs, frameworks and stdio MCP servers.

- 20, installs from an official package with supported runtimes stated.
- 25, a public CI and test suite, passing on the default branch.
- 0 to 25, open crash or regression issues relative to activity (25 for few and handled, 0 for many, old and unanswered).
- 15, semver discipline and breaking changes called out in a changelog.
- 15, version 1.0 or later, or declared stable.

Protocols are read from their reference implementations, the public facilitators or servers, spec stability and test vectors.

## 7. Transparency & trust, 60 out of 100, up to 3.5 more on the total

Made of editorial 33, provenance 86.

Why it scored 60: Closed service under published terms, per the 30 September check (15). Privacy policy updated 18 November 2024, a DPA on request, and raw request data kept 'for a limited amount of time' with no period stated (12). No deprecation policy or dated notices. The old changelog says v1 remains functional (3). Subprocessor categories only, with 'We don't publish further details of our data processors', and no hosting location (3).

The checklist (https://www.anchorterminal.com/benchmark/#checklist-transparency):

- 0 to 30, source availability and licence clarity. 30 for open source under an OSI licence, 15 for closed with clear terms, 0 for unclear terms.
- 0 to 30, data handling and retention statements that agree with each other (privacy policy, DPA, retention periods, subprocessors).
- 0 to 20, a deprecation policy or notices with dates.
- 0 to 20, telemetry disclosed with an opt-out (local software), or subprocessors and data locations disclosed (hosted).

The other half of Transparency and trust is the provenance score, computed from checked facts (below). The category score is the mean of the two.

Provenance checks not met in full (half of this category, computed from checked facts):

- Domain age: placid.app, registered 2018-05-08 (8 years) (11 of 15)
- security.txt: not found (0 of 10)

## What we couldn't check

What we couldn't read counted as absent. Publishing it on a page a plain HTTP fetch can read (not only in a browser) lets the next check count it.

- unchecked: the dollar amounts on the pricing page, which didn't render in our fetch. They're taken from the 30 September check
- We found no dated release or API change. If Placid keeps a dated changelog somewhere other than Headway, maintenance would rise sharply
- The MCP server's tool names, count and annotations aren't documented and the source isn't public
- Whether a project token can be revoked or rotated, and whether the terms include any SLA

## Weaknesses

- No OpenAPI, no llms.txt, and the MCP tool list isn't published
- MCP setup guide documents the API token in the URL query string
- Changelog has no dates, so there's no public record of recent changes
- PHP and Laravel libraries last tagged on 2022-07-20, pointing at the older placid.app/api/rest base
- Subprocessors and hosting location aren't disclosed

## What costs an agent a turn today

The notes we give agents before they call it. Each one is a workaround an agent shouldn't need.

- Send the token in the `Authorization` header, not as ?api_token=, wherever the client allows it
- Read X-RateLimit-Remaining and wait for X-RateLimit-Reset after a 429
- Use test mode for watermarked previews while matching layer names, then switch to live renders
- Leave create_now off for batches, since it caps at 10 at once and may fail under load
- Poll the returned polling_url or pass webhook_success, since images start as queued

## What the review panel asked for

- Published tool list
- Dated changelog
- State failed-render billing

## When it's done

Send what changed and where it's published as a dispute (https://www.anchorterminal.com/builders/#disputes, or `POST https://www.anchorterminal.com/api/v1/contact` with `"kind": "dispute"`). Disputes are answered in public, and the listing is checked again by the same checklist. Paying for an audit or a listing claim changes nothing here.