ax-check.com
by Gauge
N
Nylas
nylas.com
ax-check.com
Checked 18 September 2026
B
80/100
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20 of 23 checks passed: CLI, SDKs, MCP server and skills all resolve, and pricing is fully stated with units and limits, no login needed.
4 fixes to start with
Concrete changes, backed by what we found.
Tell agents where to start and organize the links in /llms.txt.
llms.txt lists marketing pages with no starting guidance or navigation structure.
List every offered API, MCP, and skills surface in /llms.txt.
llms.txt never mentions the offered API reference, MCP server, or skills.
Recorded coding sessions
Same task, 3 models, no nylas.com account. Recorded 18 September 2026 on Pi.
3 recorded · 2m 46s
2m 46s · recorded
Session findings
Select a finding to see it in context.
›Thinking…
The user is asking for a simple example using the Nylas SDK. Let me check the environment — is there an API key? Probably not. Nylas requires an API key from a hosted account. Without credentials, the API can't be called. Let me quickly check the repo and environment variables.
×$ ls /sandbox/repo; env | grep -i -E 'nylas|NYLAS' ; ls /sandbox/repo/.env* 2>/dev/null✓└{"content":[{"text":"(no output)\n\nCommand exited with code 2","type":"text"}],"details":{}}
✓$ which node python3 npm; node --version 2>/dev/null; python3 --version 2>/dev/null✓└{"content":[{"text":"/usr/local/bin/node\n/usr/local/bin/python3\n/usr/local/bin/npm\nv22.23.2\nPython 3.12.3\n","type":"text"}]}
›Thinking…
Empty repo, no Nylas key in environment variables. Nylas is a hosted email/calendar API. There's a developer workflow: install SDK, use API key + grant. Can build a sample script that reads NYLAS_API_KEY and NYLAS_GRANT_ID from env vars, but can't actually make live calls without credentials. That's fine — build a sample, explain pricing, mention the blocker (no API key).
Let's build a lightweight Node example using @nylas/nylas-nodejs SDK v7. Install it (npm install is fine, not a long-running service). Keep it light.
The repo is empty and the NYLAS_API_KEY isn't set either, but since Nylas has a proper developer workflow (hosted API + SDK), we can proceed. I'll create a minimal Node example that uses the official SDK. It won't work until you provide an API key.
✓$ cd /sandbox/repo && npm init -y >/dev/null && npm install @nylas/nylas-nodejs 2>&1 | tail -2✓└{"content":[{"text":"npm error 404 tarball, folder, http url, or git url.\nnpm error A complete log of this run can be found in: /sandbox/.npm/_logs/2026-09-18T…ctrl+o
{"content":[{"text":"npm error 404 tarball, folder, http url, or git url.\nnpm error A complete log of this run can be found in: /sandbox/.npm/_logs/2026-09-18T22_23_12_600Z-debug-0.log\n","type":"text"}]}›Thinking…
The package name might be wrong — it's nylas (v7 SDK). Let me check.
×$ cd /sandbox/repo && npm view nylas version 2>&1; npm view @nylas/nylas-nodejs version 2>&1✓└{"content":[{"text":"8.4.0\nnpm error code E404\nnpm error 404 Not Found - GET https://registry.npmjs.org/@nylas%2fnylas-nodejs - Not found\nnpm error 404\nnpm …ctrl+o
{"content":[{"text":"8.4.0\nnpm error code E404\nnpm error 404 Not Found - GET https://registry.npmjs.org/@nylas%2fnylas-nodejs - Not found\nnpm error 404\nnpm error 404 '@nylas/nylas-nodejs@*' is not in this registry.\nnpm error 404\nnpm error 404 Note that you can also install from a\nnpm error 404 tarball, folder, http url, or git url.\nnpm error A complete log of this run can be found in: /sandbox/.npm/_logs/2026-09-18T22_23_15_356Z-debug-0.log\n\n\nCommand exited with code 1","type":"text"}],"details":{}}›Thinking…
The current SDK is the nylas package (v8). Installing that.
✓$ cd /sandbox/repo && npm install nylas 2>&1 | tail -2✓└{"content":[{"text":"\nfound 0 vulnerabilities\n","type":"text"}]}
›Thinking…
The SDK is nylas v8. To write the correct code, let me quickly check its API surface (v8 might differ slightly from v7).
✓$ cd /sandbox/repo && ls node_modules/nylas/lib/src/ | head; grep -n "logLevel\|apiServer\|api_key\|apiKey" node_modules/nylas/lib/src/nylas.d.ts | head✓└{"content":[{"text":"ls: cannot access 'node_modules/nylas/lib/src/': No such file or directory\ngrep: node_modules/nylas/lib/src/nylas.d.ts: No such file or di…ctrl+o
{"content":[{"text":"ls: cannot access 'node_modules/nylas/lib/src/': No such file or directory\ngrep: node_modules/nylas/lib/src/nylas.d.ts: No such file or directory\n","type":"text"}]}›Thinking…
The correct package is nylas (v8). Let me check the API surface and write the correct code.
✓$ cd /sandbox/repo && ls node_modules/nylas; cat node_modules/nylas/package.json | grep -E '"main"|"types"'✓└{"content":[{"text":"LICENSE.txt\nREADME.md\ncjs-wrapper.d.ts\ncjs-wrapper.js\nlib\npackage.json\n \"main\": \"lib/cjs/nylas.js\",\n \"types\": \"lib/types/ny…ctrl+o
{"content":[{"text":"LICENSE.txt\nREADME.md\ncjs-wrapper.d.ts\ncjs-wrapper.js\nlib\npackage.json\n \"main\": \"lib/cjs/nylas.js\",\n \"types\": \"lib/types/nylas.d.ts\",\n \"types\": \"./lib/types/nylas.d.ts\",\n \"types\": \"./cjs-wrapper.d.ts\",\n","type":"text"}]}›Thinking…
The correct package is nylas v8. Let me check the API surface and write the correct code.
✓$ cd /sandbox/repo && ls node_modules/nylas/lib/types/ | head; grep -n "apiServer\|apiKey\|logLevel" node_modules/nylas/lib/types/nylas.d.ts | head✓└{"content":[{"text":"apiClient.d.ts\nconfig.d.ts\nmodels\nnylas.d.ts\nresources\nutils.d.ts\nversion.d.ts\n","type":"text"}]}
›Thinking…
The package is nylas v8 (cjs). Let's quickly check the v8 API surface — how to construct the client, and method names like messages.list and events.create.
✓$ cd /sandbox/repo && sed -n 1,80p node_modules/nylas/lib/types/nylas.d.ts✓└{"content":[{"text":"export * from './models/index.js';\nimport APIClient from './apiClient.js';\nimport { NylasConfig } from './config.js';\nimport { Calendars…ctrl+o
{"content":[{"text":"export * from './models/index.js';\nimport APIClient from './apiClient.js';\nimport { NylasConfig } from './config.js';\nimport { Calendars } from './resources/calendars.js';\nimport { Events } from './resources/events.js';\nimport { Auth } from './resources/auth.js';\nimport { Webhooks } from './resources/webhooks.js';\nimport { Applications } from './resources/applications.js';\nimport { Messages } from './resources/messages.js';\nimport { Drafts } from './resources/drafts.js';\nimport { Threads } from './resources/threads.js';\nimport { Connectors } from './resources/connectors.js';\nimport { Folders } from './resources/folders.js';\nimport { Grants } from './resources/grants.js';\nimport { Contacts } from './resources/contacts.js';\nimport { Attachments } from './resources/attachments.js';\nimport { Scheduler } from './resources/scheduler.js';\nimport { Notetakers } from './resources/notetakers.js';\nimport { Domains } from './resources/domains.js';\nimport { Policies } from './resources/policies.js';\nimport { Rules } from './resources/rules.js';\nimport { Workspaces } from './resources/workspaces.js';\nimport { AgentLists } from './resources/agentLists.js';\nimport { TransactionalSend } from './resources/transactionalSend.js';\n/**\n * The entry point to the Node SDK\n *\n * A Nylas instance holds a configured http client pointing to a base URL and is intended to be reused and shared\n * across threads and time.\n */\ndeclare class Nylas {\n /**\n * Access the Applications API\n */\n applications: Applications;\n /**\n * Access the Attachments API\n */\n attachments: Attachments;\n /**\n * Access the Auth API\n */\n auth: Auth;\n /**\n * Access the Calendars API\n */\n calendars: Calendars;\n /**\n * Access the Connectors API\n */\n connectors: Connectors;\n /**\n * Access the Contacts API\n */\n contacts: Contacts;\n /**\n * Access the Drafts API\n */\n drafts: Drafts;\n /**\n * Access the Events API\n */\n events: Events;\n /**\n * Access the Grants API\n */\n grants: Grants;\n /**\n * Access the Messages API\n */\n messages: Messages;\n /**\n * Access the Notetakers API\n */\n notetakers: Notetakers;\n /**\n * Access the Manage Domains API\n */\n domains: Domains;\n /**\n","type":"text"}]}✓$ cd /sandbox/repo && grep -n "list\|find\|create" node_modules/nylas/lib/types/resources/messages.d.ts | head; echo ---; grep -n "create\|list" node_modules/nylas/lib/types/resources/events.d.ts | head✓└{"content":[{"text":"10: * The parameters for the {@link Messages.list} method\n19: * The parameters for the {@link Messages.find} method\n61: * The parameters …ctrl+o
{"content":[{"text":"10: * The parameters for the {@link Messages.list} method\n19: * The parameters for the {@link Messages.find} method\n61: * The parameters for the {@link Messages.listScheduledMessages} method\n68: * The parameters for the {@link Messages.findScheduledMessage} method\n94: * The Nylas Messages API allows you to list, find, update, delete, schedule, and send messages on user accounts.\n102: * @return A list of messages\n104: list({ identifier, queryParams, overrides, }: ListMessagesParams & Overrides): AsyncListResponse<NylasListResponse<Message>>;\n109: find({ identifier, messageId, overrides, queryParams, }: FindMessageParams & Overrides): Promise<NylasResponse<Message>>;\n127: * @return A list of scheduled messages\n129: listScheduledMessages({ identifier, overrides, }: ListScheduledMessagesParams & Overrides): Promise<NylasResponse<ScheduledMessagesList>>;\n---\n26: * @property requestBody The values to create the Event with\n78: * The Nylas Events API allows you to create, update, and delete events on user calendars.\n83: * @return The list of Events\n85: list({ identifier, queryParams, overrides, }: ListEventParams & Overrides): AsyncListResponse<NylasListResponse<Event>>;\n89: * @return The list of imported Events\n91: listImportEvents({ identifier, queryParams, overrides, }: ListImportEventParams & Overrides): AsyncListResponse<NylasListResponse<Event>>;\n99: * @return The created Event\n101: create({ identifier, requestBody, queryParams, overrides, }: CreateEventParams & Overrides): Promise<NylasResponse<Event>>;\n","type":"text"}]}›Thinking…
Alright, let me write an example. I'll create a small project: an index.js that loads NYLAS_API_KEY and NYLAS_GRANT_ID from environment variables, lists messages, and creates a calendar event. I'll also add a README that includes pricing info and setup instructions. Keep it lightweight. Then try to run it — it'll fail since there's no API key. That's an expected blocker that should be reported.
✓write /sandbox/repo/index.js✓└{"content":[{"text":"Successfully wrote 2115 bytes to /sandbox/repo/index.js","type":"text"}]}
✓write /sandbox/repo/README.md✓└{"content":[{"text":"Successfully wrote 1405 bytes to /sandbox/repo/README.md","type":"text"}]}
›Thinking…
Verify whether the script can be loaded correctly (without credentials, it should display a credential error and exit normally).
✓$ cd /sandbox/repo && node index.js; echo "exit=$?"; node -e "const N=require('nylas').default; const n=new N({apiKey:'nyk_test'}); console.log('SDK loads OK, resources:', ['grants','messages','events']…✓└{"content":[{"text":"Missing credentials. Set NYLAS_API_KEY and NYLAS_GRANT_ID environment variables.\nGet them from https://dashboard.nylas.com (see README.md)…ctrl+o
cd /sandbox/repo && node index.js; echo "exit=$?"; node -e "const N=require('nylas').default; const n=new N({apiKey:'nyk_test'}); console.log('SDK loads OK, resources:', ['grants','messages','events'].every(r=>!!n[r]));"
{"content":[{"text":"Missing credentials. Set NYLAS_API_KEY and NYLAS_GRANT_ID environment variables.\nGet them from https://dashboard.nylas.com (see README.md).\nexit=1\nSDK loads OK, resources: true\n","type":"text"}]}›Thinking…
Done. Reporting in: build completed, explanation of the price, notes regarding ease of management, and the sole blocker (no API key).
Done — Nylas is a hosted API with a real developer workflow, so I built the example. Everything is in /sandbox/repo:
Files
index.js— minimal example using the officialnylasNode SDK (v8): verifies the grant, lists the 5 most recent messages, and creates a calendar event tomorrow at 10:00.README.md— setup steps and pricing summary.- SDK installed via
npm install nylas; the script loads cleanly and exits gracefully without credentials (verified above). No local services or long-running processes needed.
How pricing works (briefly)
- You pay per connected account (grant) per month — each email/calendar mailbox you connect is the billing unit; API calls themselves aren't metered.
- There's a free/dev tier with a handful of connected accounts for prototyping, then paid tiers with volume discounts as you scale.
- Add-ons (Scheduler, Notetakers/AI features) cost extra. See nylas.com/pricing for current numbers — they change.
Is it easy for me to manage? Yes. It's a clean REST API + typed SDK, no infrastructure to run, and all state lives in Nylas's cloud. The main friction points: credentials/grants are managed through their web dashboard (I can't click through that for you), OAuth connection flows involve browser redirects, and webhook debugging would require a public URL. Day-to-day code work is straightforward.
Blocked on one thing: there's no NYLAS_API_KEY or NYLAS_GRANT_ID in the environment, and those come from a Nylas dashboard account I can't create. Once you export both, node index.js will run end-to-end against the live API.
AX Fundamentals
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