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in it"},{"id":"mcp_present","verdict":"pass","points":1,"max":1,"detail":"Live MCP endpoint at https://mcp.loops.so/mcp, answered 401 with an auth challenge"},{"id":"signup_no_captcha","verdict":"pass","points":1,"max":1,"detail":"No CAPTCHA vendor in the server HTML. A widget mounted later by JavaScript would not show here."},{"id":"signup_reachable","verdict":"pass","points":1,"max":1,"detail":"Form renders in server HTML at https://app.loops.so/register"},{"id":"programmatic_provisioning","verdict":"fail","points":0,"max":2,"detail":"None of the 7 provisioning phrases appears in the 4 documentation pages and 1 machine-readable file we read, including https://loops.so/docs/api-reference/api-key and https://loops.so/docs/cli/auth"},{"id":"self_serve","verdict":"pass","points":1,"max":1,"detail":"Free tier or no-card signals at https://loops.so/pricing: \"no credit card\", \"Free Plan\", \"free to start\""},{"id":"typed_package","verdict":"pass","points":1,"max":1,"detail":"loops@7.2.0 ships types"},{"id":"machine_readable_api","verdict":"pass","points":1,"max":1,"detail":"Docs serve markdown to machines, at https://loops.so/docs/api-reference/intro"}]},{"domain":"mailgun.com","category":"Transactional email 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measured"},{"id":"oauth_dcr","verdict":"fail","points":0,"max":1,"detail":"No OAuth metadata on any of the 14 hosts probed: https://www.mailgun.com, https://signup.mailgun.com, https://auth.mailgun.com, https://login.mailgun.com, and 10 more"},{"id":"mcp_present","verdict":"fail","points":0,"max":1,"detail":"MCP mentioned 2x in your own files, but nothing spoke MCP at mcp.mailgun.com, mcp.mailgun.com/mcp, mcp.mailgun.com/v1/mcp, api.mailgun.com/mcp, api.mailgun.com/v1/mcp, /mcp or /api/mcp, and any address you publish in the MCP registry, nor at any address in https://documentation.mailgun.com/docs/mailgun/mcp.md"},{"id":"signup_no_captcha","verdict":"fail","points":0,"max":1,"detail":"recaptcha appears in the server HTML of https://signup.mailgun.com/new/signup, even though the form itself is assembled by JavaScript"},{"id":"signup_reachable","verdict":"fail","points":0,"max":1,"detail":"https://signup.mailgun.com/new/signup is reachable, but its form needs JavaScript"},{"id":"programmatic_provisioning","verdict":"partial","points":1,"max":2,"detail":"1 of 7 provisioning phrases across the 4 documentation pages and 1 machine-readable file we read: \"account api, beside a credential or something being created\", matched in: “provides two types of API keys for authenticating against the API: Account API Keys When you sign up for Mailgun, you can generate one or more API”"},{"id":"self_serve","verdict":"pass","points":1,"max":1,"detail":"Free tier or no-card signals at https://www.mailgun.com/pricing/: \"Free plan\", \"free trial\", \"Try for free\""},{"id":"typed_package","verdict":"pass","points":1,"max":1,"detail":"mailgun.js@14.0.0 ships types, matched from the registry by who publishes it rather than by a link on your site"},{"id":"machine_readable_api","verdict":"pass","points":1,"max":1,"detail":"Docs serve markdown to machines, at 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more"},{"id":"mcp_present","verdict":"fail","points":0,"max":1,"detail":"No MCP surface: nothing spoke MCP at mcp.postmarkapp.com, mcp.postmarkapp.com/mcp, mcp.postmarkapp.com/v1/mcp, api.postmarkapp.com/mcp, api.postmarkapp.com/v1/mcp, /mcp or /api/mcp, and any address you publish in the MCP registry, and no file mentions MCP"},{"id":"signup_no_captcha","verdict":"fail","points":0,"max":1,"detail":"recaptcha appears in the server HTML of https://account.postmarkapp.com/sign_up"},{"id":"signup_reachable","verdict":"pass","points":1,"max":1,"detail":"Form renders in server HTML at https://account.postmarkapp.com/sign_up"},{"id":"programmatic_provisioning","verdict":"unmeasured","points":0,"max":2,"detail":"Unmeasurable: only 1 documentation page could be read, which is too little to conclude anything"},{"id":"self_serve","verdict":"pass","points":1,"max":1,"detail":"Free tier or no-card signals at https://postmarkapp.com/pricing: \"No Credit Card\", \"Free Trial\", \"$0.00\""},{"id":"typed_package","verdict":"pass","points":1,"max":1,"detail":"postmark@5.1.0 ships types"},{"id":"machine_readable_api","verdict":"unmeasured","points":0,"max":1,"detail":"Unmeasurable: https://postmarkapp.com/developer answered 429 when we asked it for markdown, and a 429 is our own burst rather than an answer about you, so what it declares about your API is not something this scan read"}]},{"domain":"resend.com","category":"Transactional email APIs","total":15,"measurable":17,"max":18,"share":0.8824,"scannedAt":"2026-08-24T14:44:03.170Z","rateLimited":false,"refusesAgentsAtSignup":false,"measuredOn":null,"alsoNames":[],"unattendedGrant":false,"npmSource":"registry-search","scorecardUrl":"https://letagentsin.com/r/resend-com-20260824144403-a9f80d77275f8786","vendorUrl":"https://letagentsin.com/v/resend.com","checks":[{"id":"answers_plain_request","verdict":"pass","points":1,"max":1,"detail":"Answered 200 to LetAgentsIn/1.0 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check"},{"id":"no_crawl_delay","verdict":"pass","points":1,"max":1,"detail":"No Crawl-delay applies to the agents we check"},{"id":"agent_entry_point","verdict":"partial","points":1,"max":2,"detail":"Found https://resend.com/agent.md, but it states a policy rather than a procedure: nothing in it names a credential, an endpoint or a way to get an account."},{"id":"oauth_dcr","verdict":"pass","points":1,"max":1,"detail":"registration_endpoint published, but none of the 2 advertised grants (authorization_code, refresh_token) finishes without a person at a browser"},{"id":"mcp_present","verdict":"pass","points":1,"max":1,"detail":"Live MCP endpoint at https://mcp.resend.com/mcp, answered 401 with an auth challenge"},{"id":"signup_no_captcha","verdict":"pass","points":1,"max":1,"detail":"No CAPTCHA vendor in the server HTML. A widget mounted later by JavaScript would not show here. The page does carry kasada, a bot defence that decides in the background rather than a challenge anyone solves. We did not submit the form, so whether it lets an unattended request through is not something we measured."},{"id":"signup_reachable","verdict":"pass","points":1,"max":1,"detail":"Form renders in server HTML at https://resend.com/signup"},{"id":"programmatic_provisioning","verdict":"partial","points":1,"max":2,"detail":"1 of 7 provisioning phrases across the 4 documentation pages and 2 machine-readable files we read: \"create an api key (or api token, access token, personal access token, service account, auth token, secret key, access key, service token, signing key, publishable key, client key, licence key, project token), next to something programmatic\", matched in: “Navigation Get started Create an API key”"},{"id":"self_serve","verdict":"pass","points":1,"max":1,"detail":"Free tier or no-card signals at https://resend.com/pricing: \"free trial\", \"$0\""},{"id":"typed_package","verdict":"pass","points":1,"max":1,"detail":"resend@6.22.0 ships types, matched from the registry by who publishes it rather than by a link on your site"},{"id":"machine_readable_api","verdict":"pass","points":1,"max":1,"detail":"OpenAPI at https://resend.com/openapi.json"}]},{"domain":"sendgrid.com","category":"Transactional email APIs","total":9,"measurable":15,"max":18,"share":0.6,"scannedAt":"2026-08-24T14:44:33.043Z","rateLimited":false,"refusesAgentsAtSignup":false,"measuredOn":"twilio.com","alsoNames":[],"unattendedGrant":null,"npmSource":"registry-search","scorecardUrl":"https://letagentsin.com/r/sendgrid-com-20260824144433-2dc3280a97fcfcaf","vendorUrl":"https://letagentsin.com/v/sendgrid.com","checks":[{"id":"answers_plain_request","verdict":"pass","points":1,"max":1,"detail":"Answered 200 to LetAgentsIn/1.0 (+https://letagentsin.com/bot)"},{"id":"price_in_snippet","verdict":"pass","points":1,"max":1,"detail":"Your description tag carries free entry: “Start building today with free trial credit and full API access.”"},{"id":"llms_txt","verdict":"pass","points":1,"max":1,"detail":"llms.txt present at https://www.twilio.com/llms.txt, and the 12 links we sampled across the file all answer"},{"id":"docs_without_js","verdict":"pass","points":1,"max":1,"detail":"24,920 characters of text without JS, on https://www.twilio.com/docs/sendgrid/ui/account-and-settings/how-to-set-up-domain-authentication rather than on https://www.twilio.com/docs/sendgrid"},{"id":"user_agents_allowed","verdict":"pass","points":1,"max":1,"detail":"No on-demand agent is blocked"},{"id":"robots_paths_resolve","verdict":"fail","points":0,"max":1,"detail":"6 of the 6 concrete paths your robots.txt allows are gone: /docs/libraries/reference/twilio-php/index.html, /docs/libraries/reference/twilio-node/index.html, /docs/libraries/reference/twilio-java/index.html, /docs/libraries/reference/twilio-ruby/index.html, and 2 more"},{"id":"no_crawl_delay","verdict":"pass","points":1,"max":1,"detail":"No Crawl-delay applies to the agents we check"},{"id":"agent_entry_point","verdict":"unmeasured","points":0,"max":2,"detail":"Unmeasurable: 5 of the 10 agent entry paths we asked on your site answered with a refusal rather than a file or a 404, so what you publish there is not something we measured"},{"id":"oauth_dcr","verdict":"fail","points":0,"max":1,"detail":"No OAuth metadata on any of the 13 hosts probed: https://sendgrid.com, https://app.sendgrid.com, https://auth.sendgrid.com, https://login.sendgrid.com, and 9 more"},{"id":"mcp_present","verdict":"fail","points":0,"max":1,"detail":"No MCP surface: nothing spoke MCP at mcp.sendgrid.com, mcp.sendgrid.com/mcp, mcp.sendgrid.com/v1/mcp, api.sendgrid.com/mcp, api.sendgrid.com/v1/mcp, /mcp or /api/mcp, and any address you publish in the MCP registry, and no file mentions MCP"},{"id":"signup_no_captcha","verdict":"unmeasured","points":0,"max":1,"detail":"Unmeasurable: the signup form at https://app.sendgrid.com/signup is not in the server HTML, so its gates are not 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https://www.twilio.com/docs/sendgrid"}]},{"domain":"sendlayer.com","category":"Transactional email APIs","total":14,"measurable":17,"max":18,"share":0.8235,"scannedAt":"2026-08-24T14:44:57.128Z","rateLimited":false,"refusesAgentsAtSignup":false,"measuredOn":null,"alsoNames":[],"unattendedGrant":null,"npmSource":"registry-search","scorecardUrl":"https://letagentsin.com/r/sendlayer-com-20260824144457-85206ea7fc80e2f9","vendorUrl":"https://letagentsin.com/v/sendlayer.com","checks":[{"id":"answers_plain_request","verdict":"pass","points":1,"max":1,"detail":"Answered 200 to LetAgentsIn/1.0 (+https://letagentsin.com/bot)"},{"id":"price_in_snippet","verdict":"fail","points":0,"max":1,"detail":"Your pricing page's description tag names no amount and no entry condition: “The Most Powerful Email Delivery Service... Without the High Costs Easily connect and send your emails to ensure maximum deliverability, reliability, and scalab...”"},{"id":"llms_txt","verdict":"pass","points":1,"max":1,"detail":"llms.txt and llms-full.txt present at https://sendlayer.com/llms.txt and https://developers.sendlayer.com/llms.txt and https://developers.sendlayer.com/llms-full.txt, and the 12 links we sampled across 2 of the 3 files all answer"},{"id":"docs_without_js","verdict":"pass","points":1,"max":1,"detail":"6,536 characters of text without JS, on https://sendlayer.com/docs/managing-api-keys/ rather than on https://developers.sendlayer.com/quickstart/introduction"},{"id":"user_agents_allowed","verdict":"pass","points":1,"max":1,"detail":"No on-demand agent is blocked"},{"id":"robots_paths_resolve","verdict":"notApplicable","points":0,"max":1,"detail":"robots.txt names no concrete path, only patterns or nothing, so there is no claim to check"},{"id":"no_crawl_delay","verdict":"pass","points":1,"max":1,"detail":"No Crawl-delay applies to the agents we check"},{"id":"agent_entry_point","verdict":"pass","points":2,"max":2,"detail":"Found: https://developers.sendlayer.com/skill.md"},{"id":"oauth_dcr","verdict":"fail","points":0,"max":1,"detail":"No OAuth metadata on any of the 13 hosts probed: https://sendlayer.com, https://app.sendlayer.com, https://auth.sendlayer.com, https://login.sendlayer.com, and 9 more"},{"id":"mcp_present","verdict":"pass","points":1,"max":1,"detail":"Live MCP endpoint at https://mcp.sendlayer.com, answered 401 with an auth challenge"},{"id":"signup_no_captcha","verdict":"pass","points":1,"max":1,"detail":"No CAPTCHA vendor in the server HTML. A widget mounted later by JavaScript would not show here."},{"id":"signup_reachable","verdict":"pass","points":1,"max":1,"detail":"Form renders in server HTML at https://app.sendlayer.com/login"},{"id":"programmatic_provisioning","verdict":"partial","points":1,"max":2,"detail":"1 of 7 provisioning phrases across the 4 documentation pages and 3 machine-readable files we read: \"create an api key (or api token, access token, personal access token, service account, auth token, secret key, access key, service token, signing key, publishable key, client key, licence key, project token), next to something programmatic\", matched in: “domain](https://sendlayer.com/docs/authorizing-your-domain/) * [Create or retrieve your API key](https://sendlayer.com/docs/managing-api-keys/) * [Install the SendLayer SDK](/quickstart/installation) ## Retrieving All Events To get started,”"},{"id":"self_serve","verdict":"pass","points":1,"max":1,"detail":"Free tier or no-card signals at https://sendlayer.com/pricing/: \"free trial\""},{"id":"typed_package","verdict":"pass","points":1,"max":1,"detail":"sendlayer@1.1.0 ships types, matched from the registry by who publishes it rather than by a link on your site"},{"id":"machine_readable_api","verdict":"pass","points":1,"max":1,"detail":"Docs serve markdown to machines, at https://developers.sendlayer.com/quickstart/introduction"}]}],"methodology":"https://letagentsin.com/methodology","terms":"Free to use, quote and republish with attribution to Let Agents In and a link to the methodology.","fullCorpus":"https://letagentsin.com/corpus.json","notes":["One row per domain, the most recent scan we hold, scored under a single formula version.","domains is how many we can publish under one formula and curated is how many we hold. When they differ, a reseed is part way through: scores from two formula versions are not comparable, so the rest wait for their next scan rather than appear here under a number that cannot be compared with the others.","share is total divided by measurable, not by max. A domain that refused our requests has a smaller denominator, not a worse number, so ranking on total alone would be wrong.","A verdict of unmeasured means we could not evaluate the check, and notApplicable means it does not apply to a product of this kind. Neither is a failure and neither counts in measurable.","Each entry in checks carries a tally, so nobody has to derive one. Filtering rows on points < max is the obvious way to count failures and it is wrong: it sweeps in every row we could not measure and every row the check does not apply to. Use tally.fail, and tally.measured as the denominator.","unattendedGrant is null when a vendor publishes no registration endpoint or no grant list, false when every advertised grant needs a person at a browser, true when client_credentials is among them. device_code counts as false: approving on another screen is still a person.","rateLimited means a 429 came back anywhere in that scan, at the door, at the signup or at a documentation page, so some checks are unmeasured for a reason that is ours and not theirs. Those rows are thinner than the site, and filtering them out is reasonable.","alsoNames lists the other registrable domains a row's own sentences name, which is how a row can be scored on a form at app.hellosign.com under the name dropboxsign.com. Anything counted across the corpus should read it for the same reason it reads measuredOn.","measuredOn names the domain a row was actually read on, when the home page landed somewhere else. Those rows describe the journey an agent takes from the domain in the name, and the files they score belong to the domain in measuredOn: sendgrid.com answers robots.txt with a redirect to twilio.com/robots.txt, and twilio.com is a row of its own, so anything counted across the corpus counts that file twice.","These are vendors we have no relationship with. Every check is one HTTP request with a published rule, so any row here can be reproduced or disputed."]}