com.moltlinestudio/vision — MCP Server

This MCP server is a thin, dependency-free stdio bridge to Moltline Studio’s fleet of 22 hosted MCP servers. It proxies newline-delimited JSON-RPC between an MCP client that only supports stdio and the hosted server, verbatim, without telemetry, using Python 3.9+ standard library. The server is described as “Image header probing, bbox conversion, resize plans and colour maths. 4 of 6 free.”

🛠️ Key Features

Stdio bridge for clients that require stdio transport
Proxies newline-delimited JSON-RPC verbatim
Python 3.9+ standard library, no extra dependencies
Part of a 22-server hosted MCP fleet
toolCount: 6 (described as 4 of 6 free)

🚀 Use Cases

Connect stdio-only MCP clients to hosted MCP servers
Perform image-related header probing, bbox conversion, resizing, and colour maths

⚡ Developer Benefits

No install needed for clients that can use Streamable HTTP (direct connection preferred)
No telemetry
Simple proxying of JSON-RPC over stdio

⚠️ Limitations

Designed for stdio-only clients; direct Streamable HTTP support is noted as preferred
Only a subset of tools is free (“4 of 6 free”)

Topics

agent-skills, ai-agents, claude, mcp, mcp-server, model-context-protocol

moltline-mcp

A thin, dependency-free stdio bridge to Moltline Studio's fleet of 22 hosted MCP servers.

Most modern MCP clients can connect to the fleet directly over Streamable HTTP — no install needed (see Direct connection below). This bridge exists for clients that only speak the stdio transport: it proxies newline-delimited JSON-RPC between your client and the hosted server, verbatim, with no telemetry and no dependencies beyond the Python 3.9+ standard library.

160 tools across 22 servers; 110 are free.
Free tier: no registration, no account, no credentials — connect and call tools immediately.
Premium tools are unlocked with a Moltline license. Set MOLTLINE_LICENSE in your MCP client's environment; the bridge sends it as the X-Moltline-License header and never writes it to argv, URLs or logs. See auth.md.
Independently checked by MCPize on the direct endpoints (scans of 5–6 September 2026: 6 A+, 15 A, 1 B+; scores 89–98). All 22 servers score 100 on clarity, 100 on reliability and 100 on trust, 95 on protocol and 87 on safety; the one finding raised on every server is that the free tier accepts anonymous access — which is the point of it — and the spread between servers sits in MCPize's "Market" dimension (a crowded category). Each server's MCPize listing links its own public result.

Find it on: Smithery · MCPize · Glama · Clawmart · MCP Registry

The fleet

Server	Tools	What it does
`catalog`	10	Search 138 agent skills and personas by plain-language job; preview any product.
`codereview`	7	Risk-scan a diff, flag AI-generated-code tells, find secrets, report complexity.
`govern`	8	Audit an MCP config or SKILL.md for over-broad scope and prompt-injection risk.
`timeops`	5	Business days, meeting overlap, recurrence expansion, deadline and SLA math.
`data`	7	Paste-your-data analytics: CSV profiling, A/B tests, correlation, growth, cohorts.
`humanizer`	5	Find AI-isms with evidence, fingerprint a writing voice, measure burstiness.
`business`	8	30 finance, bookkeeping, legal-ops and SMB operations persona-skill products.
`creator`	8	20 blogging, brand-voice, copywriting, video and social persona-skill products.
`educator`	7	8 curriculum, classroom, accommodations and exam-prep persona-skill products.
`outbound`	8	7 outreach, sequencing, deliverability, call-coaching and CRM-hygiene products.
`personal`	9	20 inbox, calendar, travel, meals and family-logistics persona-skill products.
`research`	8	7 research navigation, thesis, note-taking and citation persona-skill products.
`skillmd-lint`	6	Lint a SKILL.md for frontmatter, structure, secrets and size. All tools free.
`merchant`	6	Commerce arithmetic: processor fees, charge-to-net, invoice totals, proration.
`shipping`	6	Dimensional weight, parcel fit, landed cost, freight class, rate cards.
`shopify`	6	Check a product CSV, URL handles, variant matrices and metafield keys.
`dropship`	6	Dropshipping unit economics: margin, lead time, SKU mapping, price ladders.
`recall`	6	A portable knowledge-graph memory you pass in and get back. No database.
`vision`	6	Image header probing, bbox conversion, resize plans, color and detection math.
`regclock`	9	Incident-reporting deadlines from the legal text (EU CRA, NIS2, DORA, GDPR, UK GDPR, HIPAA, SEC 8-K), cited.
`taxlots`	8	Crypto cost basis: parse exchange CSVs, lint, match transfers, FIFO/LIFO/HIFO lots, Form 8949 rows, 1099-DA diff.
`optimize`	11	OR-Tools routing, 3-D packing, 1-D/2-D cutting, knapsack and shift rostering with stated limits.

Machine-readable discovery: api-catalog · per-server card at https://mcp.moltlinestudio.com/<server>/.well-known/mcp/server-card.json · fleet health.

Direct connection (preferred)

If your MCP client supports Streamable HTTP (Claude Desktop, Claude Code, Cursor, and most current clients do), point it straight at the hosted endpoint — nothing to install:

json

{
  "mcpServers": {
    "moltline-timeops": {
      "type": "http",
      "url": "https://mcp.moltlinestudio.com/timeops"
    }
  }
}

Swap timeops for any slug in the table above.

The stdio bridge (for stdio-only clients)

Install

Run directly (recommended) — the bridge is a single stdlib-only file, so a clone is all you need:

bash

git clone https://github.com/GarphenGate/moltline-mcp.git
python3 moltline-mcp/moltline_mcp.py timeops   # any of the 22 slugs; default: catalog

Docker — see Docker below if you prefer a container.

A PyPI package is planned; until then, use the methods above.

Client configuration

Point your MCP client at the script with an absolute path:

json

{
  "mcpServers": {
    "moltline-timeops": {
      "command": "python3",
      "args": ["/absolute/path/to/moltline-mcp/moltline_mcp.py", "timeops"]
    }
  }
}

Or run it through Docker (after docker build -t moltline-mcp .):

json

{
  "mcpServers": {
    "moltline-timeops": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "moltline-mcp", "timeops"]
    }
  }
}

CLI

text

python3 moltline_mcp.py [server] [--timeout SECONDS] [--list] [--version]

server — one of the 22 slugs (default catalog); anything else fails fast with the valid list.
--timeout — per-request timeout in seconds (default 300, or env MOLTLINE_TIMEOUT).
--list — print the server slugs and exit.
Env MOLTLINE_BASE_URL — override the fleet base URL (for testing).
Env MOLTLINE_LICENSE — your Moltline license, sent as the X-Moltline-License header to unlock premium tools. Omit it and the bridge runs free-tier only.
Env MOLTLINE_DEBUG=1 — diagnostic logging on stderr (stdout stays protocol-clean). The license is never logged; debug output reports only whether one is configured.

Docker

The bridge also runs containerized (stdio in, network egress to the fleet required):

bash

docker build -t moltline-mcp .
docker run -i --rm moltline-mcp timeops   # any of the 22 slugs; default: catalog

See Client configuration for the matching mcpServers entry.

How it works

One process per server connection. Each JSON-RPC message read from stdin is POSTed to https://mcp.moltlinestudio.com/<server>; JSON and SSE-framed responses are relayed back to stdout as newline-delimited JSON. The bridge tracks the server-assigned Mcp-Session-Id and echoes the negotiated MCP-Protocol-Version, per the Streamable HTTP transport spec. It never inspects, stores, or reports your traffic.

Tests

The bridge ships with an offline test suite - no network, no dependencies:

bash

python -m unittest -v

Twenty-two tests cover the parts that actually break in a transport bridge: newline-delimited framing, SSE event splitting (multiple events, multi-line data: payloads, a trailing event with no blank line, comments and named events), session-id capture and reuse, protocol-version negotiation on initialize only, and error relay - a JSON-RPC error document is passed through verbatim, anything else becomes a well-formed -32603. CI runs them on Python 3.9, 3.12 and 3.13, plus a Docker build and container smoke test.

Access and licensing

Free tier — anonymous. No registration or credentials; all free tools work immediately.
Premium — unlocked with a Moltline license purchased (human-in-the-loop) at moltlinestudio.com. Set MOLTLINE_LICENSE in the environment and the bridge forwards it as the X-Moltline-License request header. It is deliberately not a command-line flag: argv is world-readable through ps. It is never placed in a URL and never logged. Details: auth.md.

boxes	array	required	Boxes to convert, each a list of exactly four numbers in from_format, e.g. [[10, 20, 100, 50]].
from_format	string	required	"coco" for [x, y, w, h], "voc" for [x1, y1, x2, y2], or "yolo" for normalised [cx, cy, w, h].
to_format	string	required	The format to convert to; same three choices.
image_width	integer	optional	Pixel width, required whenever yolo is on either side.
image_height	integer	optional	Pixel height, required whenever yolo is on either side.
clip	boolean	optional	When true, clamp boxes to the image bounds instead of returning them as they are. Off by default, because a box outside the image is usually a bug worth seeing.

width	integer	required	Source image width in pixels.
height	integer	required	Source image height in pixels.
target	string	optional	A named preset: "clip_224", "vit_384", "yolo_640", "sam_1024", "sd_512", "sd_768" or "detr_800". Ignored when target_size is set.
target_size	integer	optional	A square side length in pixels, overriding target. Use this for a size the presets do not cover.
mode	string	optional	"letterbox" scales to fit and pads the remainder, preserving aspect; "cover" scales to fill and crops the overflow; "stretch" distorts to fit exactly. Default "letterbox".

foreground	string	required	Text colour as hex, e.g. "#767676" or "767676" or "#777".
background	string	required	Background colour in the same notation.
large_text	boolean	optional	True for text at least 18pt, or 14pt bold, which WCAG allows to pass at a lower ratio. Default false.

boxes	array	required	Candidate boxes in box_format, e.g. [[0, 0, 10, 10]].
scores	array	required	One confidence per box, same order and same length as boxes.
iou_threshold	number	optional	Overlap above which the lower-scoring box is dropped. Default 0.5.
box_format	string	optional	"voc", "coco" or "yolo". Default "voc".
image_width	integer	optional	Pixel width; required for yolo boxes.
image_height	integer	optional	Pixel height; required for yolo boxes.

predictions	array	required	Predicted boxes, each {"box": [...], "label": ..., "score": ...}. Score defaults to 1.0 when omitted.
ground_truth	array	required	True boxes, each {"box": [...], "label": ...}.
iou_threshold	number	optional	Overlap at which a prediction counts as a match. Default 0.5, the usual reporting threshold.
box_format	string	optional	"voc", "coco" or "yolo". Default "voc".
image_width	integer	optional	Pixel width; required for yolo boxes.
image_height	integer	optional	Pixel height; required for yolo boxes.

Moltline Vision Maths

com.moltlinestudio/vision — MCP Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

Topics

Topics

image_probe

bbox_convert

resize_plan

colour_check

nms

detection_metrics

moltline-mcp

The fleet

Direct connection (preferred)

The stdio bridge (for stdio-only clients)

Install

Client configuration

CLI

Docker

How it works

Tests

Access and licensing

Links

License

Install

Remote endpoint

Related servers