Warmerly
A REST API on the Agency plan; an MCP server on every plan, including Free.
Warmerly
GlockApps
One-to-one · API and MCP
API and MCP
One row, in depth: what each tool does, the verified numbers, and who each suits.
GlockApps details read from its pricing, home, product, Trust Center, API and MCP pages and help centre on 21 October 2026.
Warmerly
A REST API on the Agency plan; an MCP server on every plan, including Free.
GlockApps
A REST API with GET and POST on every plan, including free, and an MCP server for manual placement tests.
The short answer
API and MCP, in one look.
Warmerly's REST API needs the Agency plan, while its MCP server works on every plan. GlockApps says its API is on every plan, including free, with GET and POST, and its MCP server can start and read Inbox Insight manual tests. GlockApps is ahead on the API. Last checked 22 October 2026.
GlockAppsGlockApps ahead on this row
A REST API with GET and POST on every plan, including free, and an MCP server for manual placement tests.
The picture
Drawn side by side.
Who gets the API
Plans with API access
WarmerlyGlockApps
Warmerly
Agency planREST API and webhooksMCP on every plan
GlockApps
Every plan, including freeREST API, GET and POSTMCP for manual tests
Warmerly's API keys are limited to 60 requests a minute by default. GlockApps does not state a rate.
How Warmerly does it
Warmerly, in detail.
An API on Agency and an MCP server on every plan.
01
Agency is $179 a month
Agency covers 100 mailboxes, with the API and client workspaces.
Warmerly product, checked 21 October 2026
02
API on Agency only
API keys, the REST API and webhooks need the Agency plan. Free, Starter and Growth get a 403 error. Each key is limited to 60 requests a minute by default and 120 at most.
Warmerly product, checked 21 October 2026
03
An MCP server on every plan
Claude, ChatGPT and other MCP clients can work in a workspace on every plan, including Free.
Warmerly product, checked 21 October 2026
04
API keys stored as hashes
Only a SHA-256 hash of an API key is stored, and the key is shown once.
Warmerly product, checked 21 October 2026
05
A 403 below Agency
A Free, Starter or Growth key request gets a 403, so the API is a plan decision, not a setting.
Warmerly product, checked 21 October 2026
06
Webhooks are signed
Health webhooks on Agency carry an HTTP signature, and a subscription can list up to 16 event types.
Warmerly product, checked 21 October 2026
07
The MCP list is wide
The MCP server covers mailboxes, campaigns, the inbox, leads and deliverability, with check_domain and run_placement_test among its tools.
Warmerly product, checked 21 October 2026
08
A reply needs your go-ahead
The send_reply tool needs confirm set to true and refuses a contact with no earlier thread, and an assistant never starts campaign sending.
Warmerly product, checked 21 October 2026
09
Access by OAuth
MCP clients connect through an OAuth 2.1 sign-in tied to one workspace or to all of yours.
Warmerly product, checked 21 October 2026
How GlockApps does it
GlockApps, in detail.
A REST API on every plan and an MCP server for manual tests.
01
API on all plans
Its API page says the API is available on all plans, including the free tier, and that GET and POST are included on every plan. Requests are REST and return JSON.
glockapps.com/api · read 21 October 2026
02
Use with your own tools
It says to use the API with internal tools, scripts, dashboards or automation platforms, and names ChatGPT, Claude, Gemini and Perplexity as assistants that can make API calls.
glockapps.com/api · read 21 October 2026
03
An MCP server
Its MCP server lets an assistant start an Inbox Insight placement test, check progress and results, and compare results. It supports manual tests only, not scheduled tests or the free checkers.
glockapps.com/mcp · read 21 October 2026
04
Test points and limits
Each test started over MCP uses one test point, the same as in the app, and you can set hourly and daily limits.
glockapps.com/mcp · read 21 October 2026
05
Which plans get MCP
The MCP page has an FAQ asking whether it is available on the Free plan, but the answer was not in the text we read.
glockapps.com/mcp · read 21 October 2026
06
The key goes in a header
The tutorial says to send the API key as an x-api-key header over HTTPS with JSON.
glockapps.com/api · read 22 October 2026
07
Five methods
GET reads, POST creates, PUT replaces, PATCH changes part of a resource, and DELETE removes projects, folders or reports, per its tutorial.
glockapps.com/blog/how-to-use-glockapps-v2-api-step-by-step-tutorial · read 22 October 2026
08
A base URL and three example calls
Its examples list projects, list providers and create a manual test at api.glockapps.com/gateway/spamtest-v2/api.
glockapps.com/blog/how-to-use-glockapps-v2-api-step-by-step-tutorial · read 22 October 2026
09
MCP connects by URL
You add api.glockapps.com/mcp as a custom connector in Claude, ChatGPT or Cursor and paste your API key on a GlockApps page, with nothing to install.
glockapps.com/mcp · read 22 October 2026
10
The assistant never holds your key
The MCP page says the assistant does not receive your API key, and the server keeps a reference to your account, so a reissued key keeps working.
glockapps.com/mcp · read 22 October 2026
11
Hourly and daily test limits
You can set hourly and daily limits on tests started through an assistant. Each MCP test costs one test point.
glockapps.com/mcp · read 22 October 2026
What GlockApps does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- Which plans include the MCP server
- API rate limits
- API rate limits
- Whether API tests use your monthly credits
- The endpoint to fetch results
- Whether the MCP server is on the Free plan
Where the sources disagree
We report each version rather than pick one.
- The API page says POST needs API Write Access permissions in one place and that writes need no upgrade in another, and the pricing table has an API Access row we could not read. We report each.
The numbers
Only what we could verify.
| Measure | Warmerly | GlockApps |
|---|---|---|
| API and MCP | A REST API on the Agency plan; an MCP server on every plan, including Free. | A REST API with GET and POST on every plan, including free, and an MCP server for manual placement tests. |
| Plans with an API | Agency only | All plans |
| Plans with MCP | Every plan | Not stated |
| API request rate | 60 a minute by default | Not stated |
| Methods offered | GET and POST in the REST API on Agency | GET, POST, PUT, PATCH and DELETE |
| Auth | Bearer key and OAuth for MCP | x-api-key header and an API key pasted for MCP |
| Key request rate | 60 a minute by default, 120 at most | Not stated |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Need an API on a small plan
GlockApps gives API access on every plan. Warmerly asks for Agency at $179 a month.
Both reach assistants
Each has an MCP server. Warmerly's works in a workspace; GlockApps' runs manual placement tests.
A 403 on Growth
A Growth customer who wants to script Warmerly would be refused until they move to Agency, a jump from $49 to $179 a month. GlockApps' API is open to its Free plan.
Sixty requests a minute
A script that makes one call per mailbox would take at most 2 minutes to cover 100 mailboxes at the default 60 a minute, if each took a single request. GlockApps' rate limits are not stated.
What an assistant can do
Through Warmerly's MCP an assistant can read mailbox health, check a domain and run a placement test. Through GlockApps' it can start a manual test, read the results and compare them. Neither starts sending to a stranger on its own.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want MCP on a free or small plan
- You want to work in a workspace from Claude or ChatGPT
- You will be on Agency anyway
- You want an MCP server on a free plan
- You want assistants limited to reads and confirmed replies
- You want signed health webhooks
GlockApps
GlockApps is the better fit if
- You want an API on a small or free plan
- You want to start placement tests from your own code
- You want to run tests from an assistant
- You want to script tests from any plan
- You want PUT, PATCH and DELETE on test data
- You want set hourly and daily limits on assistant tests
Questions
Does GlockApps have an API?
Yes. Its API page says GET and POST are available on every plan, including free (glockapps.com/api, read 21 October 2026).
Can I use the GlockApps API on the free plan?
Its API page says it is available on all plans including the free tier (read 22 October 2026). Its tutorial and pricing table are less clear on write access.
How does the GlockApps MCP connect?
Add api.glockapps.com/mcp as a custom connector and paste your API key on the page that opens (glockapps.com/mcp, read 22 October 2026).
What is the Warmerly API rate limit?
Each key is limited to 60 requests a minute by default and 120 at most.
Sources
GlockApps pages were read on 21 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
More features
- All features
- Starting price (per month)
- Pricing model
- Free plan or trial
- Active warmup (send, open and reply loop)
- Inbox placement and spam tests
- Providers and spam filters tested
- DMARC reporting
- SPF, DKIM and DMARC checks
- Uptime and IP reputation monitors
- Content and spam checks
- Campaign sending
- Agencies, teams and white label
- Security and data hosting
See it on your own mailbox.
Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.
Free plan, no card. Paid plans: 7-day trial, first charge on day 8.