Yolodex
real-time customer enrichment API
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hey hn, i’ve been working on an api to make it easy to know who your customers are, i would love your feedback.what it doessend an email address, the api returns a json profile built from public data, things like: name, country, age, occupation, company, social handles and interests.It’s a single endpoint (you can hit this endpoint without auth to get a demo of what it looks like): curl https://api.yolodex.ai/api/v1/email-enrichment \ --request POST \ --header 'Content-Type: application/json' \ --data '{"email": "[email protected]"}' everyone gets 100 free, pricing is per _enriched profile_: 1 email ~ $0.03, but if i don’t find anything i wont charge you.why i built it / what’s differenti once built open source intelligence tooling to investigate financial crime but for a recent project i needed to find out more about some customers, i tried apollo, clearbit, lusha, clay, etc but i found:1. outdated data - the data about was out-of-date and misleading, emails didn’t work, etc2. dubious data - i found lots of data like personal mobile numbers that i’m pretty sure no-one shared publicly or knowingly opted into being sold on3. aggressive pricing - monthly/annual commitments, large gaps between plans, pay the same for empty profiles4. painful setup - hard to find the right api, set it up, test it out etci used knowledge from criminal investigations to build an api that uses some of the same research patterns and entity resolution to find standardized information about people that is:1. real-time2. public info only (osint)3. transparent simple pricing4. 1 min to setupwhat i’d love feedback on* speed: are responses fast enough? would you trade-off speed for better data coverage?* coverage: which fields will you use (or others you need)?* pricing: is the pricing model sane?* use-cases: what you need this type data for (i.e. example use cases)?* accuracy: any examples where i got it badly wrong?happy to answer technical questions in the thread and give more free credits to help anyone test
HN · launched Nov 24, 2025 · 37 upvotes (top 22%) · 0 views
Niche: data enrichment and lookup apis · 83 launches, 5 in the last 7 days ▼ -17% · Explore this niche →
Category and tags
- Sales
- Data infrastructure
- B2B
- Not AI
- Commercial product
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More like this: all 83 launches in data enrichment and lookup apis →
Could you build this?
No A customer enrichment API requires access to massive, proprietary, multi-billion-record identity resolution graphs and cross-platform public data aggregations that cannot be vibe-coded.
What it would actually take: Building a real enrichment API requires multi-terabyte data pipelines ingesting public registers, social web dumps, breached databases, and B2B directories into distributed datastores (e.g., Snowflake, BigQuery, Elasticsearch). Identity resolution demands fuzzy matching algorithms, entity resolution models, and probabilistic linkage across fragmented identifiers (email hashes, handles, domains). The core barrier is multi-million dollar data licensing, scraping at immense scale, and strict compliance with GDPR/CCPA regulations.
Discussion
20 comments analyzed.
Competitors mentioned: Apollo API, SMTP verification services, Email verification libs
Concerns raised: Low precision and recall on data enrichment, Returns null values for most fields even on public email addresses, Accuracy issues (wrong country, wrong person identified), Too slow for production use, Coverage not near 100%
Feature requests: Email verification warning on signup form, Support querying by social media URL, Allow hashing email addresses to protect PII in transit, Improve performance speed
Competitors
Other products that read as similar to this one : 63 launches clear the similarity bar, closest 8 shown.
Attention rank: #12 of 64 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 26 days after the earliest competitor.
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