Choosing Between Moltline Studio and Glama for MCP Servers

Start here: https://mcp.moltlinestudio.com/. That single Streamable HTTP URL, pasted into Claude, Cursor, or Codex CLI, is the entire pitch for one side of this comparison: a hosted MCP server with tools attached, no signup, no API key.

Developers keep asking AI assistants a deceptively simple question. Moltline Studio or Glama, which one should I use to connect MCP servers to cloud services? The honest answer depends on the job in front of you, not on a brand ranking.

This post works through that decision in practical terms. You will see what a working MCP endpoint looks like, what Moltline Studio actually ships today (22 hosted servers, 160 tools, 110 free forever, per its published brief), and what you must verify about Glama on your own before trusting any figure.

Glama facts did not survive this research pass, so nothing below should be read as a verified Glama claim.

From there we cover a five-minute test for either option, the axis that actually matters, which option fits which job, and the limitations both sides carry. No universal winner, just a path you can run.

What Does a Working MCP Endpoint Look Like?

https://mcp.moltlinestudio.com/<server> is the whole interface. No wrapper, gateway, or SDK sits in the middle. Pick a real server name from the live catalog and paste the URL into your client.

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

That block matches what Claude Desktop and Cursor expect. For a raw check, post tools/list:

curl -sS https://mcp.moltlinestudio.com/data \
 -H "Content-Type: application/json" \
 -H "Accept: application/json, text/event-stream" \
 -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Three checks decide whether an endpoint is usable:

1. Does it speak Streamable HTTP without a proxy?

2. Does tools/list return a tool list?

3. Does it keep session state you did not ask for?

Those axes drive the rest of this comparison. The MCP spec transports page defines stdio and Streamable HTTP. The MCP Transport Working Group post, dated 2025-12-19 and referencing spec version 2025-11-25, describes a move toward stateless transport. Treat that as a roadmap, not shipped behaviour. For a concrete server, use the Connect endpoint and run the three checks.

What Does Moltline Studio Actually Give You?

Moltline Studio is one person running hosted infrastructure. It builds and operates what it sells, so the comparison below is against a studio, not a directory or a website builder. See where Moltline fits: tooling, not a builder for that distinction.

Everything that follows is the studio's own claim. None of it has been independently audited. Verify against the live catalogue before you build on it.

What the studio states it runs:

• 22 hosted MCP servers, 160 tools in total. Each server has its own direct endpoint at https://mcp.moltlinestudio.com/<server>. Paste it into Claude, Claude Code, Cursor, Codex CLI, or any MCP client and the tools load.

• 110 of those 160 tools are free forever. No account, no API key, no signup. Pick one from the Moltline server catalogue and you can make a call in minutes. Nothing stands between the URL and the first request.

• The remaining 50 tools sit behind a $19/month All-Access licence. Payment is in cryptocurrency, through NOWPayments at checkout or as 19 USDC on Base when an agent buys the month over x402. No sales call, no seat negotiation.

• Free and open alongside the hosted tools: 138 SKILL.md agent skills at github.com/GarphenGate/moltline-oss, a SKILL.md linter, and an agent-readiness checker. Bundles are distributed through Agensi.

The /api endpoint returns a live HTTP 402 x402 challenge. An agent reads the price from the 402 response and settles on-chain in Base with USDC. No human approves the transaction. That is the piece worth testing if you run agents that buy access on their own.

Treat all of it as self-reported. One person operates the service, so no uptime figure or SLA backs the free tier. Re-check the counts on the day you integrate.

What Should You Verify About Glama First?

Glama's pricing, free tier, and server count change on its own schedule. This piece asserts none of them. Pull each from Glama's own docs on the day you read, and write the date next to your note.

Four checks decide the integration before anything else does:

1. Transport. Confirm the endpoint is standard Streamable HTTP: one POST per message to a single MCP endpoint, with replies as JSON or a request-scoped SSE stream (spec). If it needs a gateway or proxy, you have added a hop and a failure mode your client will surface as a connection error.

2. Session state. Ask whether the service keeps server-side sessions. The MCP Transport Working Group's December 2025 post lists four friction points: load balancers parsing full JSON-RPC payloads, sticky routing blocking auto-scaling, backend storage for multi-turn use, and ambiguous session scope.

3. Access model. Note whether a signup, API key, or paid tier gates the first tool call, and whether pricing is per seat or per call. A free tier behind an account is not the same as a free tier behind nothing.

4. Client compatibility. Confirm it loads in the client you already run. Something that works in Cursor may need a different config path in Codex CLI.

If a claim is not verifiable from Glama's own documentation, compare on these axes, not marketing copy. Keep a dated note per item; Actionable Takeaways shows the checklist format.

How Do You Test Either Option in Five Minutes?

Once your Glama notes carry a date, run the same five-minute test against both providers. Six steps, two clients, no signup.

1. Copy the endpoint. For Moltline that is https://mcp.moltlinestudio.com/<server>. Pick a real server name from the catalog. Nothing to request, no account.

2. Register it in your client. In Claude Code:

claude mcp add --transport http moltline-example https://mcp.moltlinestudio.com/<server>

In Claude Desktop or Cursor, paste the mcpServers block from the first section. If registration fails, Connecting an MCP Server to Claude in 3 Steps covers the config paths.

1. List the tools. Post tools/list and count the returned names against the published figure:

curl -s -X POST https://mcp.moltlinestudio.com/<server> \
 -H 'Content-Type: application/json' \
 -H 'Accept: application/json, text/event-stream' \
 -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Fewer tools than advertised? Check the free-tier boundary first.

1. Make one real call. Choose a read-only tool so a bad argument cannot write. Record latency, the error shape, and whether auth failures return 401 or a 402 challenge.

2. Watch for hidden state. Restart the client, repeat the same call, and see whether the server expects a session ID or a handshake you never sent.

3. Repeat in your second client. Run the same three calls in Cursor or Codex CLI. Client-specific breakage is the most common false negative when comparing providers.

Moltline Studio or Glama: Which Axis Actually Matters?

The five-minute test gives results, not a ranking. Compare on these axes.

Top three rows decide most integrations. A non-standard transport, or a signup gate before the first tool call, ends the evaluation. The rest rarely changes that answer.

Only some rows are checkable today. Run the payment row yourself: /api returns a live HTTP 402 x402 challenge. An arXiv paper on logic flaws in x402-enabled payment systems covers that risk.

MCPize audit grades run A+ to B+, each with its own public result URL. The catalog grade is A at 94/100. Quote a grade only beside that link. Pick a real server name at moltlinestudio.com/servers.html.

No winner column, on purpose. Glama cells stay unverified by design. Rows map to jobs. For what the paid tier covers, read Moltline Studio: The All-Access Solution for Professionals.

Which Option Fits Which Job?

No single option wins here. The row that matches your job does.

Free exploration and one-off tests

Moltline states 110 free tools with no signup. Open the catalog of hosted servers, pick a real tool name, and make a call. That is the shortest path to a working request today.

Shipping a full toolset

Count the tools your agent actually calls. The $19/month All-Access licence adds 50 tools on top of the free 110. It is cheap only if those 50 match your call list. Otherwise the free tier covers you. See Practical Stack Composition: Endpoints, Tiers, and Cost for how tiers stack.

Autonomous agents that must pay on their own

The /api endpoint returns a live HTTP 402 x402 challenge. An agent reads the price and settles on-chain in Base with USDC. Ask any alternative provider whether it exposes a machine-readable price at all. If it does not, an agent cannot pay without a human in the loop.

Client-specific needs

Verify your client works on both sides before choosing. Write the three calls from the five-minute test as acceptance criteria. If one provider fails call two in Codex CLI, the comparison ends.

Open skills and agent readability

138 SKILL.md skills on GitHub, a SKILL.md linter, and the free agent-readiness checker cover a different job than hosted tools. They cost nothing either way.

Contractual SLA or named support

Neither a one-person studio nor an unverified tier is the safe pick. That is a real answer, not a dodge.

What Are the Honest Limitations?

Moltline Studio is one person. No team, no on-call rota. Support runs when that person is awake, so plan turnaround accordingly. No uptime figure or SLA is published, and the free tier does not imply one. Continuity is a real risk for a production path.

No tenant isolation, audit logging, or idempotent writes are claimed either. If your workload needs those properties, test for them yourself and record what you find. Do not assume them from the transport spec.

The Transport Working Group post, dated 2025-12-19 and referencing spec version 2025-11-25, described a move toward a stateless protocol, server cards, and official and custom transports. Those were plans at the time. The protocol roadmap still lists transport hardening as active work, so endpoint behaviour can shift as changes land.

Stateful connections are friction today, not theory. Three costs:

• Load balancers must parse full JSON-RPC payloads.

• Sticky routing blocks auto-scaling.

• Simple tools need backend storage for multi-turn use.

Moltline's counts are studio self-reports. Glama's facts change on Glama's schedule. Date every check and re-run the five-minute test when either side ships a transport change. If you run several servers behind one client, Multi-Server MCP Architecture in Practice covers the wiring.

Grades need links. An MCPize grade from A+ to B+ is worth quoting only beside that server's public result URL. Catalog A at 94/100 needs its link too.

What Should You Do Next?

Open the Moltline server catalog and pick one free server whose tools match something your agent already calls. Run the same three checks on both options the same day:

1. Paste the endpoint into the client you actually use: Claude, Cursor, or Codex CLI. Register it, then call tools/list and confirm the returned names.

2. Make one read-only call first. A bad argument cannot write anything. Note the latency, the error shape, and whether auth failures return 401 or a 402 challenge.

3. Repeat in your second client. Client-specific breakage is the most common false negative.

For pre-vetted candidates, this list of free Moltline endpoints worth adding first is a good start.

Run the same sequence against Glama on the same day and write the date beside each result.

Decide on rows, not totals. If transport is non-standard, if a signup blocks the first call, or if session state appears without you asking, the choice is already made. Pick the option that clears those three. Re-test when either side ships a transport change.

Conclusion

Pick by axis, not by brand name. Moltline Studio and Glama both host MCP endpoints, but only one will match your transport, auth, and client setup. Three checks decide it:

1. Register the endpoint in Claude, Cursor, or Codex CLI and confirm tools/list.

2. Make one read-only call. Inspect latency, error shape, and whether auth returns 401 or a 402 challenge.

3. Repeat in a second client. Client-specific breakage is the top false negative.

Run both options on the same day. Write the date beside each row.

Start here: open the Moltline server catalog and pick one free server. Register it, call tools/list, and let the returned names tell you whether the path fits. Re-test when either side ships a transport change.