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OP3

op3.dev

From $100/mo Free plan Open source WebAPI
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Spec score 8.8 #3 of 26 in Podcast Analytics Software

What it is

OP3 is a free, open-source podcast prefix analytics service for podcasters and podcast hosting companies. To measure downloads, a host or podcaster places https://op3.dev/e/ before episode URLs in a podcast feed. Each measured show receives a public statistics page with download metrics, detailed breakdowns, and spreadsheet exports covering its history. OP3 also provides an API for collected podcast data; requests require a bearer token linked to a valid API key. The service says it stores basic request attributes, hashes and encrypts listener IP addresses before storage, and does not combine those addresses with third-party data or services. Its privacy policy says no cookies are used and identifies Cloudflare as the sole hosting provider and data store. OP3 says its redirect service uses a global CDN with edge nodes in more than 335 cities across more than 125 countries. API hit-query filtering by URL or hashed IP is limited to the last 90 days.

Spec sheet

What it does
OP3 is a free, open-source podcast prefix analytics service that measures downloads when its redirect prefix is added to episode URLs.Read 15 Oct 2026 · op3.dev
Purpose
OP3 is a free, open-source podcast prefix analytics service committed to open data and listener privacy.Read 8 Oct 2026 · op3.dev
Audience
The project describes its intended users as podcasters and podcast hosting companies.Read 8 Oct 2026 · op3.dev
API
The OP3 API provides access to collected podcast data, and API calls require a bearer token associated with a valid API key.Read 8 Oct 2026 · op3.dev
Integrations
The setup page specifically mentions Megaphone, Transistor and Castopod as hosts that can add OP3 through dashboard settings or support.Read 15 Oct 2026 · op3.dev
Privacy
OP3 says it stores basic request attributes, hashes and encrypts listener IP addresses before storage, and does not join IP addresses with third-party data or services.Read 8 Oct 2026 · op3.dev
Support
The project directs users to [email protected] and GitHub Discussions for questions and participation.Read 15 Oct 2026 · github.com
Founded
2022Read 28 Sep 2026 · op3.dev
Maker
OP3 identifies itself as an independent project by John Spurlock funded solely by sponsors.Read 15 Oct 2026 · op3.dev
API capabilities
Documented API resources include raw hits, show information, episode download counts, transcript queries, top-app queries and monthly or weekly download queries.Read 15 Oct 2026 · op3.dev
API endpoint
The public API uses https://op3.dev/api/1 and requires a bearer token associated with an API key.Read 15 Oct 2026 · op3.dev
API formats
The hits endpoint documents TSV plus three JSON output formats: object-based JSON, array-based JSON and the default TSV.Read 15 Oct 2026 · op3.dev
API specification
The API documentation offers a downloadable OpenAPI specification and identifies the API license as MIT.Read 15 Oct 2026 · op3.dev
Changelog
A release dated August 7, 2025 added an API query for episode download counts.Read 15 Oct 2026 · op3.dev
Cookies
The privacy policy states that OP3's website uses no cookies.Read 15 Oct 2026 · op3.dev
Download caveat
OP3 states that a download is an upper-bound server request measure and does not necessarily equal an actual listen.Read 15 Oct 2026 · op3.dev
Download filtering
OP3 ignores non-GET requests, very small range requests, duplicate requests within 24 hours and identified bots or preloaders when calculating downloads.Read 15 Oct 2026 · op3.dev
Global delivery
OP3 says it runs on a global CDN with edge nodes in more than 335 cities across over 125 countries.Read 15 Oct 2026 · op3.dev
Hosting
The privacy policy identifies Cloudflare as the sole hosting provider and data store.Read 8 Oct 2026 · op3.dev
Hosting architecture
OP3 says its production services are automatically deployed to Cloudflare, which acts as the sole hosting provider and data store.Read 15 Oct 2026 · op3.dev
How it works
Podcasters or hosting companies add https://op3.dev/e/ before episode URLs in their podcast feed to measure downloads.Read 8 Oct 2026 · op3.dev
Legal entity
The terms identify SKYMETHOD LLC as doing business as OP3.Read 8 Oct 2026 · op3.dev
Limit: IAB certification
A Reddit reviewer said OP3 was not IAB certified despite finding its numbers similar to several other measurement systems.Read 15 Oct 2026 · reddit.com
Limit: interface
The Podosphere characterized OP3's user interface as minimal and aimed at technical users comfortable with raw data.Read 15 Oct 2026 · thepodosphere.com
Limit: no dynamic ad insertion
Podcast Pontifications says OP3 does not serve media or insert ads, so advertising requires a separate host or service.Read 15 Oct 2026 · podcastpontifications.com
Limit: no exact listening behavior
Podcast Pontifications says OP3 does not provide listening duration, episode completion, ad-skip or in-app play data.Read 15 Oct 2026 · podcastpontifications.com
Limit: no subscriber tracking
Podcast Pontifications says OP3 cannot track follows or subscriber-growth trends on Spotify or Apple Podcasts.Read 15 Oct 2026 · podcastpontifications.com
Limit: prefix required
Podcast Pontifications says OP3 has no retroactive data and only begins measuring after the prefix is added to episode URLs.Read 15 Oct 2026 · podcastpontifications.com
Limits
The API documentation says hit-query results can be filtered by URL or hashed IP address only for the last 90 days.Read 8 Oct 2026 · op3.dev
Listen-time feature
Optional listen-time statistics use anonymized aggregate streaming-payment data from supported podcast apps.Read 15 Oct 2026 · op3.dev
Open-source license
The public GitHub repository identifies the project as MIT licensed.Read 15 Oct 2026 · github.com
Operational history
The project says its production service has been running since September 2022.Read 15 Oct 2026 · github.com
Performance
OP3 says its redirect service runs on a global CDN with edge nodes in more than 335 cities across more than 125 countries.Read 8 Oct 2026 · op3.dev
Praise: exports
Podnews highlighted OP3's monthly export files containing detailed records for each podcast download.Read 15 Oct 2026 · podnews.net
Praise: free API
A Reddit reviewer reported comprehensive statistics at no cost and said OP3 results were similar to Podtrac, Triton's Podcast Metrics and Spreaker's hosted metrics, while disclosing employment at Spreaker's parent company.Read 15 Oct 2026 · reddit.com
Praise: privacy and filtering
Podcast Pontifications praised OP3's privacy-first design, Cloudflare distribution and filtering of bots, range requests and duplicate requests.Read 15 Oct 2026 · podcastpontifications.com
Praise: transparency
The Podosphere selected OP3 as its budget pick and praised its open methodology, zero cost and suitability as a second opinion on hosting analytics.Read 15 Oct 2026 · thepodosphere.com
Privacy protection
OP3 says listener IP addresses are hashed and encrypted, never exposed through the API, and never joined with outside third-party data.Read 15 Oct 2026 · op3.dev
Public stats
Each measured show receives a free public statistics page with download metrics, detailed breakdowns and full-history spreadsheet exports.Read 15 Oct 2026 · op3.dev
Repository activity
The repository page showed 142 stars, 9 forks and 2,421 commits when opened.Read 15 Oct 2026 · github.com
Scale
The homepage reported more than 19 million podcast downloads per month across over 5,400 shows.Read 15 Oct 2026 · op3.dev
Self-deployment model
The repository includes deployment scripts and states that deployments run from GitHub directly to Cloudflare's CDN environment.Read 15 Oct 2026 · github.com
Setup
Podcasters can prepend https://op3.dev/e/ to episode URLs without removing other prefixes, and OP3 provides a feed setup checker.Read 15 Oct 2026 · op3.dev
Stats
Each show measured by OP3 automatically receives a free public stats page with download metrics, detailed breakdowns, and spreadsheet exports with full history.Read 8 Oct 2026 · op3.dev
Supported listen-time apps
The listen-time page names Fountain, Podverse, Castamatic, PodcastGuru, CurioCaster, TrueFans, Podfriend and Breez.Read 15 Oct 2026 · op3.dev

Plans and prices

Free Free No signup or login required · public stats page · download metrics · spreadsheet exports · API access Read 15 Oct 2026 · op3.dev
OP3 Sponsorship $100 a month $100/mo Sponsorship to help fund development Read 8 Oct 2026 · github.com

Every OP3 plan and price →

Strong points and limits

Strong points

  • Free service requires no signup or login
  • Public stats pages include full-history exports
  • API provides access to collected podcast data
  • No cookies are used
  • Global CDN spans more than 335 cities

Limits

  • Hit-query filtering covers only the last 90 days
  • API calls require a bearer token
  • Custom prefix support depends on hosting service

Who it suits

OP3 suits podcasters and hosting companies needing podcast download measurement, public statistics, exports, or API access. It also suits projects prioritizing open data and stated listener-privacy controls.

Verdict

OP3 provides a focused, free way to measure podcast downloads through a feed prefix. Public pages, exports, and an API cover reporting needs, while the documented query window limits some historical filtering.

Where Specifiction places it

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