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The Cold Email Writer generates short, persuasive outreach emails from a single context description. It sends your prompt to /api/utilities/cold-email, where Gemini 2.5 Flash operates under a marketing specialist system persona — crafting emails that are direct, compelling, and tailored to the prospect you describe. Just tell it who you’re contacting, what you’re offering, and why it matters, and it hands back a ready-to-send message in seconds.

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How to use

1

Open the Cold Email Writer

Navigate to /utilities/cold-email-writter in your AI360 app.
2

Write your context

In the Email Context textarea, describe your product or service, your target prospect, and your core value proposition. The richer the context, the more relevant the output.
3

Generate the email

Click Generate Email. Skeleton placeholders appear while Gemini composes the message.
4

Review, copy, and send

Your email appears in the Your Email panel. Review it, click Copy, then paste it into your email client or CRM.

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What makes a good context prompt

The quality of the generated email depends almost entirely on how well you describe the situation. A weak prompt produces a generic email; a specific one produces something that feels hand-crafted. Include these elements for best results:
  • Who you’re contacting — name, title, or role (e.g., “startup CTO”, “VP of Sales at a mid-market SaaS company”)
  • What you’re offering — your product, service, or ask
  • Why it’s relevant to them — a specific pain point, use case, or outcome they care about
  • A concrete hook — a limited-time offer, a mutual connection, a recent event, or a stat
Example context prompts: 
SaaS project management tool targeting startup CTOs. We eliminate sprint planning
overhead by 40%. Offering a 30-day free trial with onboarding support.

Freelance copywriter reaching out to e-commerce brand founders. I specialize in
product description pages that lift conversion rates. Sharing two before/after
examples and offering a free audit of their top three pages.

B2B lead-gen agency contacting Jane Doe, Head of Growth at TechCorp. We generated
200+ qualified demos for a similar SaaS company last quarter. Want to show how we
could do the same for TechCorp's Q3 pipeline.

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API integration

Call the cold email endpoint directly from any client or server-side code: 
const response = await fetch('/api/utilities/cold-email', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ userPrompt: 'Context about your product and target audience...' })
})

const { coldEmail } = await response.json()

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Request & Response

POST /api/utilities/cold-email
​
userPrompt
string
required
A natural-language description of your campaign context: who you’re emailing, what you’re offering, and why it’s relevant to them. This becomes the basis of the entire email. The field must be non-empty.

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Success response

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coldEmail
string
The generated cold email as a plain-text string, ready to copy and send. Includes a subject line suggestion, greeting, body, and closing signature as composed by the Gemini marketing specialist persona.

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Error responses

StatusConditionResponse body
400userPrompt is missing or empty{ "error": "Missing cold email context." }
500Gemini generation failed{ "error": "Failed to generate cold email." }
Best practices for effective cold email context:
  • Be specific about the prospect. “Marketing managers at B2B SaaS companies with 50–200 employees” outperforms “businesses”.
  • Lead with the outcome, not the feature. Instead of “we have an AI analytics dashboard”, say “we help growth teams cut reporting time by half”.
  • Include a clear call to action. Tell the AI what you want the recipient to do: book a 15-minute call, reply for a free audit, claim a trial.
  • Keep context under 200 words. Gemini works best when the prompt is focused — if you over-explain, the output can lose its punch.
  • Iterate. Run the same context twice for variation, or tweak one element (audience, offer, CTA) and compare outputs.

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