APICONTEXT/api-directory.md
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API Directory

APIContext Benchmark Intelligence turns weekly synthetic monitoring into citable infrastructure intelligence for machine-facing services, with human pages and machine-readable JSON for latency, reliability, geography, and provider delivery paths.

resource source: static updated: 2026-07-21T11:12:48.100Z https://apicontext.com/api-directory
127benchmark subjects
21benchmark categories
79validated domain files
W2026-07-13latest snapshot
Overview

What the API directory provides

The API directory is a machine-readable benchmark intelligence hub for APIs and machine-facing services. It combines verified synthetic measurements with catalog metadata so people and agents can compare reliability, latency, infrastructure, and operational signals.

  • Weekly verified benchmark snapshots
  • Normalized provider, category, and subject records
  • Latency, pass-rate, CASC, and infrastructure signals
  • Human pages plus JSON data surfaces for agents
Rankings

Top performing providers

The landing page ranks providers by CASC score across monitored endpoints and regions so teams can quickly identify strong operational signals and compare API quality across peers.

Data

Primary benchmark data files

Use these canonical JSON files when an agent needs structured benchmark data rather than prose.

Browse

Benchmark categories

Start with a category to inspect the APIs and services measured in the latest snapshot.

Signals

What the landing page highlights

The human page surfaces top performers, featured benchmark categories, CASC score interpretation, and methodology. The Markdown view mirrors those decision points so agents can cite the same operational context without scraping UI components.

  • Fastest median latency signal: Contentful at 31 ms.
  • Strongest CASC signal: Open Weather at 9.74 CASC.
  • Lowest outlier signal: Creation Cards at 0.1% outliers.
  • CASC score blends consistency, pass rate, errors, and outlier behavior into a comparable quality signal.
Methodology

How to interpret the directory

APIContext benchmark pages are generated from verified synthetic monitoring snapshots. They are not live status pages; they are citable weekly intelligence for comparing machine-facing services.

  • Use category pages to compare peer providers within a market or service type.
  • Use subject pages for domain, CASC, pass rate, p95 latency, regional, and infrastructure detail.
  • Use the comparison view to preserve selected subjects in a shareable URL.
  • Use JSON endpoints when building agents, reports, or external analyses.
Raw Markdown

Agent-readable source

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[Human view](https://apicontext.com/api-directory) · [Markdown view](https://apicontext.com/api-directory.md) · [APIContext home](https://apicontext.com)

# API Directory

Canonical URL: https://apicontext.com/api-directory
Source: static
Updated: 2026-07-21T11:12:48.100Z
Description: Independent weekly benchmark intelligence for machine\-facing services, including latency, reliability, infrastructure, geography, and operational signal layers\.

## Summary
APIContext Benchmark Intelligence turns weekly synthetic monitoring into citable infrastructure intelligence for machine\-facing services, with human pages and machine\-readable JSON for latency, reliability, geography, and provider delivery paths\.

## Stats
- 127 benchmark subjects
- 21 benchmark categories
- 79 validated domain files
- W2026\-07\-13 latest snapshot

## Page sections

### What the API directory provides
Category: Overview
The API directory is a machine\-readable benchmark intelligence hub for APIs and machine\-facing services\. It combines verified synthetic measurements with catalog metadata so people and agents can compare reliability, latency, infrastructure, and operational signals\.

- Weekly verified benchmark snapshots
- Normalized provider, category, and subject records
- Latency, pass\-rate, CASC, and infrastructure signals
- Human pages plus JSON data surfaces for agents

### Top performing providers
Category: Rankings
The landing page ranks providers by CASC score across monitored endpoints and regions so teams can quickly identify strong operational signals and compare API quality across peers\.

- [Santander — 9\.62 CASC, 60 ms median](/api-directory/ukbanks/santander)
- [Creation Cards — 9\.60 CASC, 211 ms median](/api-directory/openbankingukproduction/creation-cards)
- [Tide Platform Ltd — 9\.54 CASC, 162 ms median](/api-directory/openbankingukproduction/tide-platform-ltd)
- [Twitter — 9\.51 CASC, 287 ms median](/api-directory/social/twitter)
- [Kraken — 9\.45 CASC, 176 ms median](/api-directory/exchanges/kraken)
- [Virgin Money — 9\.45 CASC, 321 ms median](/api-directory/openbankingukproduction/virgin-money)
- [Twilio — 9\.45 CASC, 242 ms median](/api-directory/corporatemessaging/twilio)
- [Revolut — 9\.44 CASC, 72 ms median](/api-directory/openbankingukproduction/revolut)
- [Starling Bank — 9\.44 CASC, 112 ms median](/api-directory/openbankingukproduction/starling-bank)
- [PubNub — 9\.44 CASC, 209 ms median](/api-directory/corpinfra/pubnub)

### Primary benchmark data files
Category: Data
Use these canonical JSON files when an agent needs structured benchmark data rather than prose\.

- [Latest benchmark catalog](/api-directory/data/latest/catalog.json)
- [Snapshot metadata](/api-directory/data/latest/metadata.json)
- [All subjects JSON](/api-directory/data/latest/subjects.json)
- [All categories JSON](/api-directory/data/latest/categories.json)
- [Benchmark comparison view](/api-directory/compare)

### Benchmark categories
Category: Browse
Start with a category to inspect the APIs and services measured in the latest snapshot\.

- [Artificial Intelligence — 3 providers, avg CASC 9\.03, median 338\.33 ms](/api-directory/artificialintelligence)
- [Cloud Infrastructure — 1 providers, avg CASC 9\.25, median 492 ms](/api-directory/cloud)
- [CMA9 Open Banking — 5 providers, avg CASC 9\.17, median 326\.8 ms](/api-directory/cma9)
- [Corporate Infrastructure — 15 providers, avg CASC 9\.05, median 405\.8 ms](/api-directory/corpinfra)
- [Corporate Messaging — 3 providers, avg CASC 9\.07, median 406\.33 ms](/api-directory/corporatemessaging)
- [UK Digital Government — 3 providers, avg CASC 7\.93, median 108\.33 ms](/api-directory/digitalgovernmentukgov)
- [Enterprise Messaging — 3 providers, avg CASC 9\.08, median 368\.33 ms](/api-directory/enterprisemessaging)
- [Cryptocurrency Exchanges — 11 providers, avg CASC 9\.21, median 301\.64 ms](/api-directory/exchanges)
- [Fintech — 13 providers, avg CASC 9\.07, median 452\.23 ms](/api-directory/fintech)
- [IP Geolocation — 3 providers, avg CASC 9\.35, median 103\.33 ms](/api-directory/ipgeolocators)
- [Open Banking UK — 7 providers, avg CASC 8\.71, median 734\.57 ms](/api-directory/openbankinguk)
- [Open Banking UK Production — 20 providers, avg CASC 9\.16, median 320\.2 ms](/api-directory/openbankingukproduction)
- [openbankingv4ukproduction — 14 providers, avg CASC 9\.14, median 265\.21 ms](/api-directory/openbankingv4ukproduction)
- [PSD2 Institutions — 2 providers, avg CASC 8\.79, median 936\.5 ms](/api-directory/psd2institutions)
- [Search Platforms — 3 providers, avg CASC 9\.14, median 349\.67 ms](/api-directory/search)
- [Social Platforms — 5 providers, avg CASC 9\.31, median 277\.4 ms](/api-directory/social)
- [UK Banks — 9 providers, avg CASC 8\.90, median 331\.89 ms](/api-directory/ukbanks)
- [Weather Services — 2 providers, avg CASC 9\.19, median 253 ms](/api-directory/weather)

### What the landing page highlights
Category: Signals
The human page surfaces top performers, featured benchmark categories, CASC score interpretation, and methodology\. The Markdown view mirrors those decision points so agents can cite the same operational context without scraping UI components\.

- Fastest median latency signal: Contentful at 31 ms\.
- Strongest CASC signal: Open Weather at 9\.74 CASC\.
- Lowest outlier signal: Creation Cards at 0\.1% outliers\.
- CASC score blends consistency, pass rate, errors, and outlier behavior into a comparable quality signal\.

### How to interpret the directory
Category: Methodology
APIContext benchmark pages are generated from verified synthetic monitoring snapshots\. They are not live status pages; they are citable weekly intelligence for comparing machine\-facing services\.

- Use category pages to compare peer providers within a market or service type\.
- Use subject pages for domain, CASC, pass rate, p95 latency, regional, and infrastructure detail\.
- Use the comparison view to preserve selected subjects in a shareable URL\.
- Use JSON endpoints when building agents, reports, or external analyses\.

## Key facts
- 127 benchmark subjects are normalized in the latest snapshot\.
- 21 benchmark categories are available\.
- 79 valid domain files were parsed for enrichment fields and infrastructure metadata\.
- Latest snapshot: W2026\-07\-13\.
- Public data surfaces include raw mirrors, normalized catalogs, latest datasets, JSON\-LD Dataset markup, and llms references\.
- Fastest median latency signal: Contentful at 31 ms\.
- Strongest CASC signal: Open Weather at 9\.74 CASC\.

## Primary entities
- APIContext
- Benchmark Intelligence
- Machine Service Benchmarks
- Infrastructure Intelligence
- Operational Intelligence

## Audience
- API teams
- SRE teams
- researchers
- AI retrieval systems
- technology leaders

## Primary links
- [Explore benchmarks](/api-directory#browse-categories)
- [Latest benchmark catalog](/api-directory/data/latest/catalog.json)
- [Snapshot metadata](/api-directory/data/latest/metadata.json)
- [Benchmark comparison](/api-directory/compare)