Can an agent send an email with Resend Email API?

A person decides once at Access. Interface found; job not yet run.

observedProbed 12 Octrevision sha256:edf0aa77c17d…

Who does each step

how grades work →

Whether the agent handles it alone or a person has to step in.

01
Discover
Machine
The vendor's machine-readable docs show the agent where and how to call this job.
02
Access
Approval · setup
You consent once to the agent's own client.
03
Onboard
Machine
The agent can register itself with no person.
04
Pay
Not applicable
Nothing to pay for the job.
05
Confirm
Machine
The response or specification defines errors the agent can distinguish from success.
06
Sustain
Machine
The agent can renew and revoke its own access.

You, once, at Access: consenting to the agent's access.

Agent surfaces

6 kinds · 10 entries

OAuth

api.resend.com1 more

mcp.resend.com

Names the job's endpoint

For agents

api.resend.com3 more

mcp.resend.com resend.com/auth.md resend.com/llms.txt

Names the job's endpoint

API

api.resend.com

Names the job's endpoint

Other

resend.com/.well-known/agent-skills/index.json

skills index

API catalog

api.resend.com

api-catalog

MCP

mcp.resend.com/mcp

server card

The probe

12 Oct 2026 · 00:05 UTC · 61.43 s

Each request it sent and what came back; the descriptors it read, counted, with what they named.

Discover42 descriptor reads17 facts

Found: Otherresend.com/.well-known/agent-skills/index.jsonAPI catalogapi.resend.comMCPmcp.resend.com/mcpAPI catalogapi.resend.comAPI catalogapi.resend.comAPI catalogapi.resend.comFor agentsresend.com/auth.mdFor agentsresend.com/llms.txtAPI catalogapi.resend.comAPI catalogapi.resend.comAPI catalogapi.resend.comAPI catalogapi.resend.comFor agentsmcp.resend.comAPI catalogapi.resend.comAPI catalogapi.resend.comFor agentsmcp.resend.comAPI catalogapi.resend.com
From: resend.com/.well-known/agent-skills/index.json · resend.com/.well-known/api-catalog · resend.com/.well-known/mcp/server-card.json · resend.com/.well-known/oauth-authorization-server · resend.com/.well-known/oauth-protected-resource · resend.com/auth.md · resend.com/llms.txt · resend.com/openapi.json · api.resend.com/.well-known/oauth-authorization-server · api.resend.com/.well-known/oauth-protected-resource · mcp.resend.com/.well-known/oauth-protected-resource · resend.com/openapi.yaml
This endpoint: api.resend.com is named by a descriptor it read

Job requestPOST api.resend.com/emails40146 ms

Request: POST https://api.resend.com/emails
Response: 401 · application/json · 71 bytes
Body: sha256:14e4055764300f6a5cf8b264d8b689ecd1f1dd69f0b74afda25c45cc5332da3e
Exchange: sha256:3a6c76669012810686e035f3fb4fedeb3e02f4ac988d583a7abdc9f1e0a2c045

Resource metadataGET api.resend.com/.well-known/oauth-protected-resource/emails40143 ms

Request: GET https://api.resend.com/.well-known/oauth-protected-resource/emails
Response: 401 · application/json · 71 bytes
Body: sha256:510953a6c2f54c22d136bd1eeb19371597672a4e0426e232b7324db7ce292712
Exchange: sha256:f0c56ceaef0981356de2dc58683c006561c9821fd2beda6c68e9b8c895766400

Resource metadataGET api.resend.com/.well-known/oauth-protected-resource20035 ms

Request: GET https://api.resend.com/.well-known/oauth-protected-resource
Response: 200 · application/json · 239 bytes
Body: sha256:2b48a89ff7e8d7402ffbba7c4f3f6b7aa2c830541b2206bfbdb99457da574d39
Exchange: sha256:ed98843eda917eb0b691375cd4184ba8a2544d00f59ccdfa2befde1281fc2c74

Authorization serverGET api.resend.com/.well-known/oauth-authorization-server20040 ms

Request: GET https://api.resend.com/.well-known/oauth-authorization-server
Response: 200 · application/json · 757 bytes
Body: sha256:2c52487b85cf2f02c3587bfcb91b9faa73363547aad88ec9673f191f74a16e9c
Exchange: sha256:03d27aba160f597e370378615629429d9f74b489b2b72d8b5a788de04252cc9f

AuthorizationGET api.resend.com/oauth/authorize?response_type=code&client_id=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fclient.json&redirect_uri=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fcallback&state=144f357a991b5f51a9bd2a5c907fe01a&code_challenge=sFL7FxWIaSwrSMEgqYh0m5oPUDtsAHdMOqzTT2Z30WM&code_challenge_method=S256&resource=https%3A%2F%2Fapi.resend.com%2Femails&scope=full_access+emails%3Asend302121 ms

Request: GET https://api.resend.com/oauth/authorize?response_type=code&client_id=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fclient.json&redirect_uri=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fcallback&state=144f357a991b5f51a9bd2a5c907fe01a&code_challenge=sFL7FxWIaSwrSMEgqYh0m5oPUDtsAHdMOqzTT2Z30WM&code_challenge_method=S256&resource=https%3A%2F%2Fapi.resend.com%2Femails&scope=full_access+emails%3Asend
Response: 302 · text/html · 0 bytes
Body: sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Exchange: sha256:1d579a86fd4e27880ee72487b8a2b261ec536cc0fb616e00c635e421555ca789

Job requestsession openedPOST mcp.resend.com/mcp40139 ms

Request: POST https://mcp.resend.com/mcp
Response: 401 · application/json · 131 bytes
Body: sha256:f5fca1e8e0994a3b094862865413dcd99bb826788294ff69444c3254cb5df6c4
Exchange: sha256:5ca36aeb01ed8ba4106f967f632ed10db4f1ad344c7313b119194a9e42c7e8a4

Resource metadataGET mcp.resend.com/.well-known/oauth-protected-resource20052 ms

Request: GET https://mcp.resend.com/.well-known/oauth-protected-resource
Response: 200 · application/json · 126 bytes
Body: sha256:3f08bebd5087d0bf2fe7df8e265f90c695f71adff9f67ae60217c1796fc81c06
Exchange: sha256:15893e66dad3f5ea37be83ad9f2fd04de323e0fb93aec13d6fa8bb7270682dde

Authorization serverGET api.resend.com/.well-known/oauth-authorization-server20046 ms

Request: GET https://api.resend.com/.well-known/oauth-authorization-server
Response: 200 · application/json · 757 bytes
Body: sha256:2c52487b85cf2f02c3587bfcb91b9faa73363547aad88ec9673f191f74a16e9c
Exchange: sha256:a24e27b711bc18d3117e3712638fa95a3175fa0661ceb1167a181b73d1ebb166

Request: GET https://api.resend.com/oauth/authorize?response_type=code&client_id=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fclient.json&redirect_uri=https%3A%2F%2Fapi.sourcey.com%2F.well-known%2Fagent-readiness%2Fcallback&state=144f357a991b5f51a9bd2a5c907fe01a&code_challenge=sFL7FxWIaSwrSMEgqYh0m5oPUDtsAHdMOqzTT2Z30WM&code_challenge_method=S256&resource=https%3A%2F%2Fmcp.resend.com%2Fmcp
Response: 302 · text/html · 0 bytes
Body: sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Exchange: sha256:66abf8ba153dde840e8f58cce955496de3fab23ff9dcb4e0482cf1cd62300656

Declared pageGET resend.com/signup200117 ms

Request: GET https://resend.com/signup
Response: 200 · text/html · 85789 bytes
Body: sha256:e681572b1b16870822b883d70df4e0ddf8c8954aebd08769c381badfc8ae3267
Exchange: sha256:e755c0d5b01935958799800d519ebb80f3c18458a73c6b811688b7fe1762a627

Resend on the startup-offers board

catalog record →

$25,000 in credits$25,000 in credits for current YC batch
$15,000 in credits$15,000 in credits for YC alumni

The grade’s badge

One image that keeps itself current, linking here.

[![agent grade](https://sourcey.com/badges/agent-readiness/arp_01m4pm965kszdjv7mtbxwabfys.svg)](https://sourcey.com/c/resend/agent-readiness/resend-email-api/email-send)

Improve the report

Correct it, probe it again, or improve the path.

Report outdated evidence Request reassessment Claim this record

Profile: arp_01m4pm965kszdjv7mtbxwabfys
Revision: sha256:edf0aa77c17dcb8f4d0c944a0ee0395bf2e15d66ad56ada21c898d5bc1997b3b
Projection: sha256:265bac03b48e8ea90c3b5d7b6ef4be415996a1eaf4882bb0a30745d7c4256a46
Policy: kind-2026-10-12 · sha256:0a4e4996176ce674b4f3ce910c5fca4f37c9b53bcdf51656d53a1a92fcf2c879
Base release: sha256:fdf027c07c287feaa7eb5e2732c9d6f1e003762f15530e66c925c5ea5b39cded

A report or a reassessment request names this profile, its revision and its projection. How report cards are assessed →View the exact declaration

Who does each step

Discover

Access

Onboard

Pay

Confirm

Sustain

Agent surfaces

The probe

Resend on the startup-offers board

The grade’s badge

Correct it, probe it again, or improve the path.