FGP Resend Daemon

Ultra-fast Resend email operations using direct API access. 30-60x faster than MCP alternatives.

Why FGP?

Operation	FGP Daemon	Browser/MCP	Speedup
Send email	15-30ms	~800ms	25-55x
Get email	10-20ms	~500ms	25-50x
List emails	12-25ms	~600ms	25-50x
Batch send	20-40ms	~1000ms	25-50x

Direct Resend API via persistent daemon.

Installation

brew install fast-gateway-protocol/tap/fgp-resend

# Or
bash ~/.claude/skills/fgp-resend/scripts/install.sh

Setup

export RESEND_API_KEY="re_xxxxxxxxxx"

Get API key from https://resend.com/api-keys

Usage

Send Emails

# Simple email
fgp resend send --to "user@example.com" --subject "Hello" --text "Hello world!"

# HTML email
fgp resend send --to "user@example.com" --subject "Welcome" --html "<h1>Welcome!</h1>"

# With from address
fgp resend send --from "hello@yourdomain.com" --to "user@example.com" --subject "Hi"

# Multiple recipients
fgp resend send --to "a@example.com,b@example.com" --subject "Announcement"

# CC and BCC
fgp resend send --to "user@example.com" --cc "manager@example.com" --bcc "log@example.com"

# With attachment
fgp resend send --to "user@example.com" --subject "Report" --attach ./report.pdf

# Reply-to
fgp resend send --to "user@example.com" --reply-to "support@example.com"

# With tags
fgp resend send --to "user@example.com" --subject "Welcome" --tags "onboarding,welcome"

Email Status

# Get email
fgp resend email <email-id>

# List emails
fgp resend emails

# List by status
fgp resend emails --status delivered
fgp resend emails --status bounced

Batch Sending

# Send batch from JSON
fgp resend batch --file emails.json

# emails.json format:
# [
#   {"to": "a@example.com", "subject": "Hello A", "text": "..."},
#   {"to": "b@example.com", "subject": "Hello B", "text": "..."}
# ]

# Batch with template
fgp resend batch --template welcome --recipients recipients.json

Domains

# List domains
fgp resend domains

# Add domain
fgp resend domain add yourdomain.com

# Verify domain
fgp resend domain verify yourdomain.com

# Get DNS records
fgp resend domain dns yourdomain.com

# Remove domain
fgp resend domain remove yourdomain.com

API Keys

# List API keys
fgp resend keys

# Create API key
fgp resend key create --name "Production" --permission full

# Delete API key
fgp resend key delete <key-id>

Audiences (Lists)

# List audiences
fgp resend audiences

# Create audience
fgp resend audience create "Newsletter Subscribers"

# Add contact
fgp resend audience add <audience-id> --email "user@example.com" --name "John"

# Remove contact
fgp resend audience remove <audience-id> --email "user@example.com"

# List contacts
fgp resend audience contacts <audience-id>

Available Commands

Command	Description	Example
send	Send email	fgp resend send --to x --subject y
email	Get email	fgp resend email <id>
emails	List emails	fgp resend emails
batch	Batch send	fgp resend batch --file x.json
domains	List domains	fgp resend domains
domain add	Add domain	fgp resend domain add x.com
audiences	List audiences	fgp resend audiences

Email Templates (React Email)

Use React Email templates:

# Send with React Email template
fgp resend send \
  --to "user@example.com" \
  --react ./emails/welcome.tsx \
  --props '{"name": "John"}'

Example Workflows

Welcome email

fgp resend send \
  --from "welcome@yourapp.com" \
  --to "newuser@example.com" \
  --subject "Welcome to YourApp!" \
  --html "<h1>Welcome!</h1><p>Thanks for signing up.</p>"

Password reset

fgp resend send \
  --from "no-reply@yourapp.com" \
  --to "user@example.com" \
  --subject "Reset your password" \
  --html "<p>Click <a href='https://yourapp.com/reset?token=xxx'>here</a> to reset.</p>"

Check delivery

# Send and get ID
EMAIL_ID=$(fgp resend send --to "x@example.com" --subject "Test" --text "Test" --json | jq -r '.id')

# Check status
fgp resend email $EMAIL_ID

Troubleshooting

Invalid API key

Error: Invalid API key

Check RESEND_API_KEY is correct.

Domain not verified

Error: Domain not verified

Add DNS records: fgp resend domain dns yourdomain.com

Rate limited

Error: Rate limit exceeded

Resend allows 10 emails/second on free tier.

Invalid from address

Error: From address not allowed

Use a verified domain or onboarding@resend.dev for testing.

Architecture

• Resend REST API
• API key authentication
• UNIX socket at ~/.fgp/services/resend/daemon.sock
• Async delivery with webhook support