Discover newsletters in a target niche relevant to your ICP, evaluate audience fit, estimate reach and CPM, and output a ranked shortlist of sponsorship opportunities. Uses web search to find newsletters, then scores each against ICP alignment criteria.
SkillScore82Maintained
Automatic
◆Marketing & Content pack
Last verified 8/16/2026
What it changes
Passed 15 of 18 test cases with the skill, and 11 of 18 without it.
Without skill59%
With skill82%
Checks it passed that the model alone missed
Estimates a flat rate between $50 and $150 per send.
Assigns 1 to 5 points per dimension for a total of 25 points.
Categorizes newsletters scoring 10 to 14 into Tier 3 (Watchlist).
and 3 more in the full report
5 fixed13 passed either way4 still failing0 broke
Pass-rate lift
+23 pp
Tokens
+60%
Agent turns
0%
Response time
-27%
Model gemini-3.6-flashMeasured 8/16/2026v118 of 22 cases passed with skill · 18 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 5
Prompt
We found a niche AI engineering newsletter with 3,500 subscribers that has no public rate card. Based on standard pricing benchmarks for micro-newsletters under 5,000 subscribers, what flat rate range per send should we estimate for budgeting?
What was checked, without and with the skill
Checked
Without skill
With skill
Estimates a flat rate between $50 and $150 per send.
Missed
Passed
case-08 · gemini-3.6-flash · 8/16/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md191 linessingle file
Sponsored Newsletter Finder
Find newsletters your ICP reads, evaluate their audience fit, and produce a ranked shortlist ready for outreach. Cheaper and faster than building your own list from scratch — newsletters already have the trust and the audience.
Best for: Seed/Series A teams with $500-5,000/month to test a paid distribution channel. Not for companies without budget or companies targeting a mass-market ICP.
When to Use
"Find newsletters I can sponsor to reach [ICP]"
"What newsletters does my target audience read?"
"I want to test newsletter sponsorship — where should I start?"
"Give me a ranked list of newsletters for [industry/role]"
Phase 0: Intake
ICP definition — Target title, industry, company stage (e.g., "VP of Sales at Series A-C B2B SaaS companies")
Monthly budget — Rough range for sponsorships (e.g., "$1,000-3,000/month")
Geography — US only, global, or specific region?
Campaign goal — Awareness (brand mention) or direct response (signup/demo)?
Any newsletters you're already subscribed to or know about in this space? (Seeds the search)
Phase 1: Discovery via Web Search
Search for newsletters using multiple angles:
Search Queries to Run
"[ICP industry] newsletter" sponsorship
"[ICP role] newsletter" site:substack.com OR site:beehiiv.com
"best newsletters for [ICP role/industry]"
"[ICP industry] newsletter" "advertise" OR "sponsor"
"[competitor company] newsletter sponsorship" (find where competitors are already advertising)
newsletter directory "[ICP industry]"
Build and maintain a scored Total Addressable Market (TAM) using Apollo Company Search. Discovers companies matching ICP, scores fit (0-100), assigns tiers (1/2/3), and auto-builds a persona watchlist for Tier 1-2 companies using Apollo People Search (free). Outputs to CSV.