# Dapper

**Canonical:** https://apis.io/providers/dapper/  
**APIs profiled:** 0

Dapper was an advertising-technology and web-data company founded in 2006 by Jonathan Aizen and Eran Shir, seed-funded by Accel. It ran two surfaces: Dapper Ads, an intent-driven dynamic-ad product that pulled live product and inventory data from an advertiser's own site into targeted creative without IT integration; and open.dapper.net (the "Dapp Factory" / Dapper: The Data Mapper), a hosted tool that turned any web page into structured feeds, web services and widgets — XML, RSS, JSON, YAML, CSV, iCalendar, Google Gadgets, Netvibes modules and image loops — effectively letting anyone "create an API for any site" before providers published their own. Dapper was acquired by Yahoo! in 2010 and both surfaces were shut down; dapper.net now resolves to Yahoo nameservers with no host, and open.dapper.net no longer resolves. There is no live API, developer portal, or documentation to enrich.

## Kin Score — 5.0 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 5.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Tags

Company, Advertising, AdTech, Web Scraping, Data Extraction, Mashups, Defunct, Acquired

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/dapper/). Scores are computed from the provider's own public artifacts under a published rubric.