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API Performance: When Every Millisecond Counts

api performance from apimetrics

Admittedly, it was a slow week in terms of API performance problems. Things are mostly working as they should, with the exceptions below among others. But the issues we did see highlight just how crucial it is to be on top of API performance with proper monitoring, observation, and validation. Let’s take a look.

kraken crypto currency api performance

Top Drops in API Performance

Kraken in the Crypto Exchanges collection dropped 13 places, the most of any drop in any collection last week. This was primarily due to a slight but steady increase in processing time affecting most monitored endpoints.

This may seem dramatic, and to be sure, anytime you have an API performance issue, it’s going to impact a business in terms of time, money and customer lost. But there’s only a .57 CASC score difference between the first-place Coin Metrics and 16th place Kraken. When everyone is performing well, even the slightest stumble can knock you out of the game.
Ulster Bank API performance

Ulster Bank NI in the Open Banking UK Production collection dropped 10 places.

This was due to a partial outage on the 14th affecting their Create Consents endpoint which saw their API return HTTP 500 Internal Server Error responses.

Ulster Bank API performance

Department of Energy API Performance

Once again, the Department of Energy in the US Government collection was in the Red Zone with a CASC score of 3.67. Still terrible, but improving. Outlier rate is down 0.99% points now sitting at 35.7% and standard deviation is down 7.31% to 3984ms.

It’s clear they just don’t care about this API, or their API performance in general.

Other API Performance Stats

  • Revolut in the Open Banking UK Production category takes the overall title for best API again this week with a CASC score of 9.81, down from 9.83 last week.
  • Contentful in the GGV Capital API-First category is the fastest API again this week with an average latency of 53 ms, down from 55 ms last week.
  • Monzo Bank is the best-performing bank in the Open Banking UK Production category with monitored AISP (non-consent) endpoints again this week with a CASC score of 9.31, down from 9.35 last week.
  • Dept of Energy in the US Government category is the overall worst performing API again this week with a CASC score of 3.67, up from 3.49 last week.
  • 10 categories are topped by an API with a CASC score of 9.50 or more, the same as last week.
  • 15 categories are topped by an API with a CASC score of 9.00 or more, up from 14 last week.
  • 1 categories have bottom API with a CASC score of 9.00 or more, the same as last week.
  • 7 categories have bottom API with a CASC score of 8.00 or more, down from 14 last week.
  • 2 APIs (Barclays Personal Sandbox in the Open Banking UK Sandboxes collection with a CASC score of 5.55, Dept of Energy in the US Government collection with a CASC score of 3.67) are in the Red Zone with a CASC score of less than 6.00 this week, down from 3 last week.

API performance Changes

Corporate Infrastructure

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Microsoft Office3658.829.121311-2
Github9.39.3565-1
Box9.539.6221-1
Google Workspace9.129.1798-1
Microsoft Graph (Office)8.638.621413-1
PagerDuty9.179.16891
Docusign9.19.1111121
Auth09.589.56121
Intercom9.349.29561
Sendgrid8.828.612142

Corporate Messaging

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
RingCentral9.479.5421-1
Twilio9.069.0643-1
Africa’s Talking9.28.82341
Infobip9.499.36121

Enterprise Messaging

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Slack9.269.3421-1
Zoom8.48.6654-1
Microsoft Graph (Teams)8.468.54451
Discord9.469.14121

Exchanges

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Kraken9.029.45163-13
LA Token8.989.151810-8
Poloniex8.518.872620-6
Binance US9.119.19128-4
Coinpaprika9.09.091713-4
bitFlyer9.039.131511-4
HitBTC8.868.982017-3
Bancor Network7.918.073129-2
Coinbase9.049.121412-2
OKEx9.449.4832-1
CoinMarketCap8.428.452928-1
Bithumb8.528.672524-1
3commas8.518.522726-1
Binance8.488.492827-1
Coinone9.219.2387-1
Bitrrex9.239.18792
Gate.io9.139.0510155
KuCoin9.078.9713185
Korbit9.119.0411165
Bitfinex9.189.069145
CoinLore8.576.6524317
Gemini9.528.5422523

Fintech

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Finicity7.928.76138-5
DNB currency APIs8.829.3684-4
Intuit8.228.341210-2
Tink9.569.5732-1
Truelayer9.369.3743-1
Stripe (Sandbox)9.619.5921-1
Yapily8.618.7109-1
Yodlee (Sandbox)8.438.1811121
Paypal (Sandbox)8.778.319112
Wise APIs (Sandbox)9.627.8611312

GGV Capital API-First

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Merge8.418.632825-3
Plaid8.538.732623-3
Radar8.788.832220-2
Codat9.319.3775-2
Fidel API8.218.423028-2
Gretel8.818.862018-2
MessageBird9.019.151311-2
Stytch9.08.981413-1
Alchemy9.199.1898-1
PubNub9.469.4832-1
Algolia9.249.3487-1
Truelayer9.369.3754-1
Duffel8.968.981514-1
Daily9.129.17109-1
Alpaca8.88.7421221
Unit9.499.4231
Modern Treasury8.828.8318191
EMnify8.538.6225261
Mapbox9.079.0611121
Stripe9.449.37462
Courier8.828.8219212
Deepgram8.418.2927303
Shippo9.028.9712153
Belvo8.578.5323274
Contentful9.359.166104

IP Geolocators

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange

Open Banking UK Open Data

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
NatWest Group9.749.7621-1
Santander8.618.3787-1
Lloyds Group8.788.8976-1
Allied Irish Bank9.89.73121
Barclays8.837.99682

Open Banking UK Production

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Ulster Bank NI8.759.342313-10
Halifax8.819.12215-7
Cater Allen Private Bank9.179.44159-6
Lloyds Bank8.638.762521-4
Tesco Bank8.278.492925-4
Virgin Money8.848.942117-4
OBIE Directory8.58.632622-4
RBS Production9.29.391410-4
Tide Platform Ltd9.739.7642-2
Vanquis Bank7.767.763129-2
Nationwide Building Society9.249.381311-2
Sainsbury’s Bank9.459.5486-2
Yorkshire Building Society7.127.543231-1
Allied Irish Bank (GB)9.649.6654-1
Bank of Scotland8.888.852019-1
Creation Cards9.599.44682
Barclays Business9.018.8417203
NewDay – Aqua9.799.61253
Monzo Bank9.319.359123
NatWest Production9.39.2510144
TSB8.287.0228324
Capital One8.748.1824284
Cumberland Building Society9.279.0912164
HSBC Bank (Business)8.948.5319245
Bank of Ireland (UK) Plc9.098.5416237
HSBC Bank (Personal)9.288.44112615

Open Banking UK Sandboxes

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Bank of Ireland Sandbox8.59.1553-2
RBS Sandbox9.429.4332-1
OBIE Sandbox8.418.3165-1
Allied Irish Bank Sandbox9.526.49264

PSD2 Institutions

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Capital One US (sandbox)7.967.5431-2
ABN7.557.442-2
Deutsche Bank7.986.65242
Open Bank Project9.346.97132

Search

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange

Social

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
Foursquare9.429.4143-1
Soundcloud8.989.276-1
Tumblr9.489.36341
Facebook9.079.15671

UK Government

ProjectCurrent CASC ScorePrevious CASC ScoreCurrent RankPrevious RankChange
NHS9.059.2432-1
Police.UK9.069.11231
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