Deliverability insights
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What Is A2A Protocol and How Email Deliverability Fits In
A2A (Agent-to-Agent) is Google's open protocol for agents to collaborate. Here is how a deliverability tool fits into an A2A pipeline — with examples.
npx ldm-inbox-check-mcp: Zero-Install Email Deliverability for AI Agents
One npx command, zero install, instant MCP server. The fastest way to give Claude or Cursor an email deliverability tool.
MCP Servers for Marketing: Email, SEO, Analytics — What Is Available in 2026
The current landscape of MCP servers for marketing workflows: deliverability, SEO audits, Google Analytics, Segment, HubSpot. An honest inventory.
How to Self-Host Our MCP Server (Docker + Environment Variables)
One Dockerfile, one env file, one bind mount. Run the Inbox Check MCP server on your own infrastructure with air-gapped API keys.
MCP vs REST API: When to Use Which for Email Deliverability
MCP is for interactive AI workflows. REST is for cron jobs and CI. Here is when each wins — and why most teams need both.
Building an AI Email Deliverability Agent With MCP and LangChain
A working LangChain agent that uses Inbox Check over MCP: runs placement tests, reads results, proposes DNS fixes, opens a PR. Full code.
Claude Code + MCP: Automate Email Infrastructure Checks From Terminal
Give Claude Code the Inbox Check MCP server. Now your terminal agent can audit DNS, run placement tests and fix records without switching windows.
Cursor + Inbox Check MCP: Test Deliverability Without Leaving Your IDE
Drop our MCP config into Cursor. Now Cursor's agent can test your transactional templates while you edit them. Setup in 2 minutes.
MCP Server for Email: 5 Tools Your AI Agent Can Call Right Now
start_test, get_test, check_auth, check_blacklist, list_providers. The five tools our MCP server exposes — with example LLM prompts for each.
How to Add Inbox Placement Testing to Claude Desktop in 2 Minutes
Paste one JSON block into claude_desktop_config.json, restart Claude, and ask it to test your sender. A 2-minute setup with screenshots.
What Is MCP and Why Your AI Agent Needs Email Deliverability Tools
Model Context Protocol (MCP) in plain English. Why giving your agent a deliverability tool changes what it can do for you.
Inbox Check API Error Handling: Retries, Timeouts, Idempotency
The error-handling contract: retriable vs terminal codes, recommended backoff, idempotency keys, and the one error class every integration gets wrong.
Inbox Check API Response Format: JSON Schema, Status Codes, Pagination
The response envelope, pagination semantics, cursor vs page, and the JSON schema you can paste into your OpenAPI generator.
Inbox Check API Free Tier: Rate Limits, Quotas, and Why It Is Generous
The real free-tier numbers: requests per minute, tests per day, concurrent streams. Plus the upgrade thresholds and why we don't gate SPF/DKIM checks.
How to Integrate Inbox Placement Tests Into Your SaaS Product
White-label deliverability checks inside your SaaS — how to wire up the API, display results, handle webhooks, and brand the output.
Inbox Check API: cURL Examples for Every Endpoint
Copy-paste cURL snippets for auth, create test, poll, stream, list, cancel, quota. The fastest way to kick the tires on our API.
Inbox Check API: Node.js SDK Quick Start (npm install inbox-check)
npm install, Bearer auth, first test, stream results, webhooks — the 10-minute Node.js quick start with TypeScript examples.
Inbox Check API: Python SDK Quick Start (pip install inbox-check)
pip install, auth, first test, async polling, streaming. The 10-minute Python quick start — sync + async flavours.
Monitoring Email Deliverability With Cron Jobs and Our API
A cron job, a 30-line Node script, and your inbox rate over time. The minimal monitoring stack for small teams.
How to Build an Email Deliverability Dashboard With Our API and React
A working React dashboard — inbox rate per provider, trend lines, DMARC alignment. Full code, SWR + Recharts + Inbox Check SDK.
Inbox Placement API vs GlockApps API: Free Tier, Limits and DX Compared
Request shape, auth, rate limits, SDK coverage, pricing. An honest side-by-side of the two APIs — for developers choosing where to integrate.
Webhook Integration: Get Notified When Your Inbox Placement Drops
Register a webhook, receive signed deliverability alerts, verify HMAC, route to Slack. Full payload format and a 40-line receiver example.
Inbox Check API: Authentication, Rate Limits, Error Handling
Bearer tokens, key rotation, rate-limit headers, 429 handling. The complete API contract you need to ship a reliable integration.
Automate Email Deliverability Checks Before Every Deployment
Block a bad email template from shipping: run a placement test in CI, fail the build on >20% spam, deploy confidently. A working recipe.
How to Run an Inbox Placement Test From Your CI/CD Pipeline
Put a deliverability test between "build" and "deploy". GitHub Actions, GitLab CI and CircleCI configs that work out of the box.
Inbox Placement Test API: Complete Developer Guide (REST, Auth, Endpoints)
The definitive developer guide — every endpoint, every parameter, auth flow, webhook lifecycle, SDK coverage. Bookmark this.
Automated Inbox Placement Testing With AI Agents: No GlockApps Needed
Schedule recurring placement tests from Claude, Cursor or a cron script. How to set up automated deliverability monitoring without a paid dashboard.
MCP Server for Email Deliverability: Test From Claude or Cursor (Free)
Drop our MCP server into Claude Desktop or Cursor, and let the agent run inbox placement tests, DMARC checks and DNSBL scans inline while you debug.
Inbox Placement Test API: Free Tier vs GlockApps ($59/mo and up)
Two REST calls and one SSE stream. The minimal API surface for an inbox placement test, benchmarked against GlockApps's paid-only API.
GlockApps Uptime Monitor Alternative: Do You Really Need It?
Sending-server uptime sounds useful until you read what it measures. A reality check on uptime monitoring and cheaper ways to get the same signal.
GlockApps DMARC Analyzer Alternative: Free Options That Actually Work
DMARC aggregate parsing you can do without a $59/mo dashboard. Five open-source and free tools, and which one to pick for your setup.
Email Header Analyzer: Parse SPF, DKIM and DMARC Results From Headers
How to read Received, Authentication-Results, ARC-* headers. Paste your raw header, get a plain-English verdict on every authentication check.
Rspamd Score Check: What Modern Spam Engines Think About Your Email
Rspamd is what Mailcow, Postfix and most modern MTAs actually run. The scoring symbols to watch, how to read them, and how to lower your score.
Email Authentication Test: SPF + DKIM + DMARC in One Click (Free)
Check all three records plus alignment in a single test. The one-page walkthrough of what "pass" actually means for each line.
DNSBL Check: Is Your IP on a Blacklist? Free Scan Across 50+ Lists
Spamhaus ZEN, SORBS, Barracuda, SURBL, URIBL — the DNSBLs worth checking and which to ignore. A free scan across 50+ lists in under 5 seconds.
Real Inbox Screenshots: See Exactly Where Your Email Lands (Free)
Not just "Inbox / Spam" — actual screenshots from Gmail, Outlook, Yahoo, Mail.ru and 20+ more. Why screenshot tests catch things verdict-only tools miss.
DNS Health Check for Email: MX, PTR, rDNS — All Free
One test that covers every DNS record your deliverability depends on: MX, SPF, DKIM, DMARC, PTR, FCrDNS, Spamhaus DBL. No signup.
Email Blacklist Check: Free Tool for IP and Domain (50+ Lists)
The blacklists that matter, the ones to ignore, and a free scanner that checks both your sending IP and your domain in a single run.
SpamAssassin Score: How to Check It Free Without GlockApps
SpamAssassin runs on millions of servers. How to get your real score, see which rules fired, and lower it — without paying for GlockApps.
Free SPF, DKIM and DMARC Check Online: No Signup
Paste your domain. Get SPF syntax, DKIM selector lookup, DMARC policy and alignment — instantly, without handing over an email address.