COMPETITOR MONITORING FOR PLUGIN DEVELOPERS

Developer Tools Codex plugins

Follow your plugin and competitors. Review changes to their positioning, capabilities and published terms, with dated source evidence.

Explore 11,248 plugins across 14 categories.

Follow up to 10 plugins for free. Newest means first added to our catalog, not the publisher’s release date.

Developer Tools plugins 12

1–12 of 12

All words must match. Use quotes for an exact phrase.

Compare plugins by developer and category
Plugin / developerCategoryFollow
AgentMart Site CheckCiphyr Tech OÜChecks a website's public setup from the outside (HTTPS and security headers, certificate dates, SPF and DMARC, privacy, terms and contac...

Publisher capabilities · listing

Check HTTPS, headers and certificate dates Check SPF and DMARC records Find privacy, terms and contact pages Check llms.txt, robots.txt and MCP Show an earlier result by its check_id

Show in context →
6 more matching sources

Publisher full description

AgentMart Site Check reads the public setup of a website, the way any visitor or AI agent sees it from the outside. Give it a domain such as example.com. It checks HTTPS and security headers, certificate dates, email sender records (SPF and DMARC), whether privacy, terms and contact pages can be found, and files for AI agents (llms.txt, robots.txt and MCP). Each item comes back as pass, warn, fail or not checked, with plain steps…

Show in context →

Publisher keywords · listing

website-check security-headers https spf dmarc llms-txt mcp

Show in context →

Publisher description

Checks a website's public setup from the outside (HTTPS and security headers, certificate dates, SPF and DMARC, privacy, terms and contact pages, llms.txt, robots.txt and MCP) through a remote MCP server that changes nothing on the sites it checks, with no sign-in, and returns plain steps to fix…

Show in context →

Plugin name

AgentMart Site Check

Show in context →

Package name

agentmart-site-check

Show in context →

Publisher subtitle

Check a website's public setup

Show in context →
Developer ToolsVersion 1.0.1
View details →
DomainCanaryFinal Dynamics LLCCheck a domain's SPF, DKIM and DMARC records, build an SPF record, find out what a bounce means and read a DMARC aggregate report.

Publisher capabilities · listing

Check DMARC, SPF and DKIM records Build an SPF record Explain a bounce code Read a DMARC aggregate report

Show in context →
4 more matching sources

Publisher description

Check a domain's SPF, DKIM and DMARC records, build an SPF record, find out what a bounce means and read a DMARC aggregate report.

Show in context →

Publisher full description

DomainCanary checks the email authentication records your domain publishes in DNS and shows you what to fix. Ask for a check to see your live DMARC, SPF and DKIM records, plain-English explanations of any problems, and the exact records to publish. Tell us which services send your email and we'll build one SPF record for all of them, tracking your…

Show in context →

Publisher subtitle

Check SPF, DKIM and DMARC

Show in context →

Publisher keywords · listing

dmarc spf dkim email authentication dns bounce

Show in context →
Developer ToolsVersion 1.0.0
View details →
Zovo DNS CheckerZovoCheck live DNS records and email authentication (SPF, DMARC, DKIM, MX) for a domain.

Publisher keywords · listing

dmarc checker spf record checker mx lookup check spf record dmarc check dkim checker email dns check mx record check spf lookup count dns lookup txt record lookup

Show in context →
6 more matching sources

Publisher description

Check live DNS records and email authentication (SPF, DMARC, DKIM, MX) for a domain.

Show in context →

Publisher full description

Check a domain's live DNS records and email authentication with an email DNS check that queries public resolvers through DNS-over-HTTPS for MX, SPF, DMARC, and DKIM, then returns a pass/warn/fail findings list and a CSV report. SPF is parsed into its mechanisms and the DNS lookups are counted against the RFC 7208 limit of 10, so an include ch…

Show in context →

Publisher translations · package

DNS- und E-Mail-Auth-Check Prüfen Sie die Live-DNS-Einträge einer Domain und die E-Mail-Authentifizierung. Eine Abfrage über DNS-over-HTTPS liest MX, SPF (mit der DNS-Abfragezahl gegenüber dem Limit von 10 nach RFC 7208), DMARC (Richtlinie, Reporting, Ausrichtung) und DKIM für die angegebenen Selektoren und liefert eine Pass/Warn/Fail-Liste mit Kor…

Show in context →

Plugin name

Zovo DNS Checker

Show in context →

Package name

dns-checker

Show in context →

Publisher subtitle

Live DNS & email auth checks

Show in context →
Developer ToolsVersion 1.0.0
View details →
DNS InspectorSalvatore CordianoDNS Inspector looks up the main DNS record types (A, AAAA, CNAME, MX, TXT, NS, SOA) for any domain and displays them in a clear, readable...

Publisher capabilities · listing

Look up A, AAAA, CNAME, MX, TXT, NS and SOA records for any domain Find a domain's mail servers (MX) and authoritative nameservers (NS) Check IPv4 and IPv6 addresses and CNAME aliases Inspect TXT records such as SPF, DMARC and domain verification Look up subdomains and internationalized domain names (IDN) Refresh results and copy any record value with one click

Show in context →
4 more matching sources

Publisher keywords · listing

dns dns lookup dig domain mx records mail servers nameservers txt records spf dmarc ipv6 cname soa developer tools

Show in context →

Publisher subtitle

Look up DNS records instantly

Show in context →

Publisher description

DNS Inspector looks up the main DNS record types (A, AAAA, CNAME, MX, TXT, NS, SOA) for any domain and displays them in a clear, readable widget, with one-click refresh and copy-to-clipboard for each value.

Show in context →

Publisher translations · package

Consulta i record DNS DNS Inspector consulta i principali tipi di record DNS (A, AAAA, CNAME, MX, TXT, NS, SOA) di qualsiasi dominio e li mostra in un widget chiaro e leggibile, con aggiornamento in un clic e co…

Show in context →
Developer ToolsVersion 2.0.1
View details →
Email Domain DoctorAhmad KhodrChecks public email DNS configuration (MX, SPF, DMARC, and optional DKIM) for technical validity.

Publisher capabilities · listing

Check MX records Validate SPF configuration Inspect DMARC policies Verify DKIM selectors

Show in context →
4 more matching sources

Publisher full description

Email Domain Doctor inspects the public email DNS setup of any domain. It validates MX records, checks SPF configuration and mechanism policies, parses DMARC policies and reporting addresses, and optionally inspects DKIM records when a selector is provided.

Show in context →

Publisher description

Checks public email DNS configuration (MX, SPF, DMARC, and optional DKIM) for technical validity.

Show in context →

Publisher subtitle

Check email DNS setup

Show in context →

Publisher keywords · listing

email dns spf dmarc dkim mx email-authentication mcp

Show in context →
Developer ToolsVersion 0.1.0
View details →
Email Spam TesterSerhii TanichevCheck an email before you send it: 42 technical checks with a fix plan, the folder it lands in at different mailbox providers, and perman...

Publisher capabilities · listing

Reserve a one-hour test address Full check: SPF, DKIM, DMARC, blocklists, content Fix plan with DNS records Folder at different mailbox providers Permanent mailbox for a series of letters

Show in context →
4 more matching sources

Publisher full description

Email Spam Tester checks an email the way receiving mail servers do, before it goes out to your list. Ask for a test address and send your draft to it from the platform you normally use. Within a minute the card in the chat turns into a report: a score out of 100, SPF, DKIM and DMARC, reverse DNS, TLS, 21 blocklists, links, HTML structure, the Gmail and Yahoo bulk-sender rules, SpamAssassin and Rspamd verdicts and a ClamAV scan. The report ends with a fix plan, and DNS records come ready to paste. ChatGPT can rewrite the draft from there, and you test again with a fresh address. The same send can also show which folder the email lands in at different mailbox provide…

Show in context →

Publisher subtitle

Check email before you send

Show in context →

Publisher keywords · listing

email deliverability spam spf dkim dmarc inbox placement newsletter

Show in context →

Publisher description

Check an email before you send it: 42 technical checks with a fix plan, the folder it lands in at different mailbox providers, and permanent mailboxes that check every letter of a series.

Show in context →
Developer ToolsVersion 1.0.1
View details →
AstraVerify Domain Trust CheckAstraVerify

Publisher description

AstraVerify checks whether a domain is trustworthy in the two places that matter today: the inbox and the AI answer. Ask about any domain and it returns two scores out of 100. Email Security covers MX, SPF, DKIM and DMARC, including whether DMARC is actually enforced, and every finding comes with the exact TXT record to paste. Discoverability covers what search engines and AI crawlers can actually get from the site: robots.txt rules for Googlebot, Bingbot, GPTBot, ClaudeBot, OAI-SearchBot and PerplexityBot,…

Show in context →
2 more matching sources

Plugin name

AstraVerify Domain Trust Check

Show in context →

Publisher subtitle

Email and AI discovery check

Show in context →
Developer ToolsVersion 1.0.0
View details →
mailXMailwarm Inc.Live email deliverability checks: SPF, DKIM, DMARC, BIMI, blacklists and DNS, plus SPF and DMARC record generation.

Publisher capabilities · listing

Run a full email deliverability audit in one step Check SPF, DKIM, DMARC and BIMI records Detect the DKIM selector automatically Check a domain against major email blacklists Look up MX, TXT, CNAME, PTR and full DNS records Generate SPF and DMARC records Find SMTP and IMAP settings…

Show in context →
4 more matching sources

Publisher description

Live email deliverability checks: SPF, DKIM, DMARC, BIMI, blacklists and DNS, plus SPF and DMARC record generation.

Show in context →

Publisher full description

mailX finds out why your emails land in spam or junk, using live DNS checks, and tells you exactly what to fix. Ask in plain English, for example "why are my emails going to spam?", "does my domain have the SPF, DKIM and DMARC that Gmail and Yahoo require for bulk senders?" or "check DMARC for acme.com". mailX runs the checks in real time: - Full email deliverability audit in one step: SPF, DKIM, DMARC,… …X, with the fixes to apply in priority order - SPF, DKIM, DMARC and BIMI validation, with the exact record found and what it means - DKIM selector detection, so you don't need to know your selector - Blacklist lookup for a domain across major DNS blocklists such as Spamhaus, Barracuda and SpamCop -…

Show in context →

Publisher keywords · listing

email deliverability spam junk spf dkim dmarc bimi blacklist dns gmail outlook google workspace microsoft 365

Show in context →

Publisher translations · package

…uestion simplement, par exemple « pourquoi mes emails arrivent en spam ? », « mon domaine a-t-il le SPF, le DKIM et le DMARC exigés par Gmail et Yahoo pour les envois en masse ? » ou « vérifie le DMARC de acme.com ». mailX lance les vérifications en temps réel : - Audit complet de délivrabilité en u…

Show in context →
Developer ToolsVersion 1.0.1
View details →
Domain DoctorYasar Shehzad

Publisher full description

Give Domain Doctor a public domain to check DNS records, inbound email routing, SPF, DMARC and HTTPS certificate configuration. Get evidence-backed findings with importance, explanations and practical next steps. Known DKIM selectors can be checked when you supply them. Use it to…

Show in context →
2 more matching sources

Publisher subtitle

Check DNS, email and HTTPS

Show in context →

Publisher capabilities · listing

Diagnose public DNS configuration Review email authentication and MX routing Check HTTPS certificates and redirects

Show in context →
Developer ToolsVersion 1.0.0
View details →
Domain ScanCYBERACE

Publisher description

Domain Scan by CYBERACE checks a domain's email, HTTPS and DNS security, including SPF, DKIM, DMARC, TLS certificates, security headers, DNSSEC and blocklists. Get a security score, per-check findings and suggested fixes, with a temporary report link when available. No account or AP… …on-demand public domain scans; it does not access account data, configure monitoring or modify DNS records.

Show in context →
1 more matching sources

Publisher subtitle

Check your domain security

Show in context →
Developer ToolsVersion 1.0.0
View details →
LookupLabEveryday Software LLC

Publisher full description

Check a phone number's carrier and line type, inspect an email's syntax and domain, look up approximate IP location and network, or inspect MX, SPF, DMARC and DKIM records. Connect your LookupLab account with OAuth. The plugin does not place calls, send messages or change DNS. Carrier data does not verify a person's identity or consent. Email checks do not prove…

Show in context →
3 more matching sources

Publisher description

Check phone carriers, email domains, IP networks and DNS records using your connected LookupLab account.

Show in context →

Publisher subtitle

Check phone, email, IP and DNS

Show in context →

Publisher capabilities · listing

Phone carrier and line type Email syntax and domain checks IP location and network Email DNS inspection

Show in context →
Developer ToolsVersion 1.0.2
View details →
DomaineeCommon Ninja

Publisher description

…r domains, webhook endpoints, and DNS verification. 16 diagnostic tools need no account at all: SSL checks, DNS and TXT record lookups, WHOIS, CNAME resolution, HTTP headers, DNS propagation, redirects, SPF/DKIM/DMARC, domain age and availability, subdomain finding, reverse IP, and website status.

Show in context →
Developer ToolsVersion 1.0.0
View details →