# Murmur Technologies INC

**Canonical:** https://apis.io/providers/murmur-technologies-inc/  
**Website:** https://murmurcars.com  
**APIs profiled:** 0

Murmur Technologies INC (Murmur) is a Chicago, Illinois out-of-home advertising technology company operating a mobile digital billboard platform. It mounts smart LCD screens on car-tops and pedestrian backpacks to display geo-targeted ads on city streets, using sensors, computer vision, and location data to segment audiences by demographics, location, and behavior, measure ad performance in real time, and retarget viewers across other channels such as Facebook and Google. The company was surfaced as a portfolio company of 500 Global and added to the API Evangelist network as a lead for enrichment. As of the 2026-08-12 enrichment pass the operation appears dormant: both marketing domains (murmurcars.com and murmurads.com) carry Route 53 nameservers but no A record at all, and the blog host times out. The one surviving surface is portal.murmurads.com, the advertiser portal, a static React single-page app served from Amazon S3 behind CloudFront whose last build shipped 2024-12-26. Its JavaScript bundle calls a private REST backend at backendapp.murmurcars.com/api/v1/ (campaigns, venues, zipcode demographics, GPS, air quality and user endpoints), but that host — while it still resolves — has TCP 443 and 80 dead, so the portal front-end can no longer reach its own API. Murmur publishes no public API, developer portal, documentation, SDK, or machine-readable specification of any kind, and no package exists for it in any public registry.

## Kin Score — 5.0 / 100 (minimal)

Scored 2026-08-19 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).

## Security (1)

- **Murmur Technologies Inc Domain Security** — DMARC

## Tags

Company, Advertising, AdTech, Out-of-Home Advertising, Digital Billboards, Mobile Advertising, Marketing

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