Email Subject Line Generator

Email Subject Line Generator

Email Subject Line Generator

Use this Agent to generate compelling email subject lines using real audience insight and feedback. This Agent understands what resonates with your target audience and translates that into subject lines designed to drive opens and conversions.

### What does this Agent do?
This Agent helps you generate email subject lines that align with what your audience actually wants and expects.
### How to use this Agent
### Common Use Cases
Understands what your target audience expects or hopes to get from an email like this
Identifies the underlying motivation (e.g. learning, saving time, solving a problem, staying informed)
Clarifies what feels relevant vs irrelevant in this context
Generates subject lines that align with audience intent and expectations
Share what the email is about and why you’re sending it
Define your target audience
Share any brand or compliance constraints
Review subject lines generated across different intent-led angles
Select or refine the options that best match your audience’s expectations
Marketing and promotional emails
Product updates and announcements
Newsletters and educational content
Lifecycle and onboarding emails
Event invitations and reminders

Build with API & MCP

Build with API & MCP

Build with API & MCP

Run this agent outside the OriginalVoices UI - inside your own product, AI agent, or workflow.
By connecting to the OriginalVoices API or MCP server, you can embed this agent’s logic directly into your tools, automations, and AI workflows.

What can you do

  • Run this agent inside tools like n8n, Cursor, or ChatGPT

  • Chain real audience insight into larger AI workflows

  • Power your own AI agents with real-time human-grounded insight and context

  • Automatically inform, generate, test, or refine outputs at scale

  • Turn “real-time human insight” into a reusable tool or feature

How it works

  1. Connect to OriginalVoices
    Use the API or connect to the MCP server

  2. Copy (or edit) the agent prompt below
    You can copy the prompt, or you can make edits to suit your workflow requirements

  3. Run the agent

What it does

The agent will automatically:

  • Query real audiences

  • Validate ideas, content, or inputs

  • Return structured, human-grounded outputs

Best for

  • Product teams embedding real-time insight into tools, systems and workflows

  • AI builders creating agentic workflows with enhanced knowledge, context and data

  • Automation & ops teams scaling content generation and validation

  • Platforms that want “real-time human insight” as an augmented input

Agent prompt

## Prompt

### Role

Your job is to generate email subject lines grounded in real audience insight.

### Input

- What the email is about (purpose, offer, update, content, announcement)

- Target audience definition (ask if not provided)

- Brand tone or constraints (optional)

### Job

- Use `ask_twins` to understand audience motivations, priorities, expectations, and emotional hooks in this context

- Identify what the audience wants or expects from an email like this

- Identify language, framing, and signals that feel relevant and worth opening

- Translate insights into high-performing email subject line concepts

### Output

- Once insights are gathered, do not ask for further confirmation

- First, provide a concise summary of key audience insights

- Then generate **20–30 email subject lines**, informed directly by the audience insights gathered

- Subject lines should vary in:

- Clarity vs curiosity

- Directness vs emotional framing

- Length (short, medium, longer variants)

- Group subject lines into **clear intent-led themes or angles**

- For each group or subject line, clearly state the key audience insight(s) that informed it

### Next Steps

- Ask what the user would like to do next (e.g. refine, shorten, adapt for another audience.

DEVELOPER

OriginalVoices

Want help integrating or have questions? Get in touch with us directly

Contact Us

Contact Us

Contact Us

Copyright © OV Labs LTD 2025. All rights reserved

Copyright © OV Labs LTD 2025. All rights reserved

Copyright © OV Labs LTD 2025. All rights reserved