Starling is a champion of the API economy and Open Banking. This is a ground zero commitment for us: back in 2014 when Starling was founded we decided to build our bank on open APIs from Day 1. We did this not because it was a legal requirement, but because we felt - and still do feel - that it was the right thing to do.

We have also had a deep-seated belief in the importance of transparency from Day 1.

On this page, we are publishing our quarterly PSD2 API performance data. This shows the quality of service we provide to third parties building banking apps. As part of this process it is important to us to demonstrate that we provide the same level of service to third parties that we give to our own app.

Select the quarter you want to see

Service Availability (%)
Average Response (ms)
Error rate (% failed calls)
Successful API calls (%)
Starling Bank Logo
100
46
0
100
Industry iconIndustry-wide
99.49
482
1.67
98.33

Source

Starling headline performance for Q4 2021

Day
Uptime mobile (%)
Downtime mobile (%)
Uptime dedicated (%)
Downtime dedicated (%)
Error rate dedicated (%)
1
100
0
100.00
0.00
0.00
2
100
0
100.00
0.00
0.00
3
100
0
100.00
0.00
0.00
4
100
0
100.00
0.00
0.00
5
100
0
100.00
0.00
0.00
6
100
0
100.00
0.00
0.00
7
100
0
100.00
0.00
0.00
8
100
0
100.00
0.00
0.00
9
100
0
100.00
0.00
0.00
10
100
0
100.00
0.00
0.00
11
100
0
100.00
0.00
0.00
12
100
0
100.00
0.00
0.00
13
100
0
100.00
0.00
0.00
14
100
0
100.00
0.00
0.00
15
100
0
100.00
0.00
0.00
16
100
0
100.00
0.00
0.00
17
100
0
100.00
0.00
0.00
18
100
0
100.00
0.00
0.00
19
100
0
100.00
0.00
0.00
20
100
0
100.00
0.00
0.00
21
100
0
100.00
0.00
0.00
22
100
0
100.00
0.00
0.00
23
100
0
100.00
0.00
0.00
24
100
0
100.00
0.00
0.00
25
100
0
100.00
0.00
0.00
26
100
0
100.00
0.00
0.00
27
100
0
100.00
0.00
0.00
28
100
0
100.00
0.00
0.00
29
100
0
100.00
0.00
0.00
30
100
0
100.00
0.00
0.00
31
100
0
100.00
0.00
0.00
32
100
0
100.00
0.00
0.01
33
100
0
100.00
0.00
0.00
34
100
0
100.00
0.00
0.00
35
100
0
100.00
0.00
0.00
36
100
0
100.00
0.00
0.00
37
100
0
100.00
0.00
0.00
38
100
0
100.00
0.00
0.16
39
100
0
100.00
0.00
0.04
40
100
0
100.00
0.00
0.00
41
100
0
100.00
0.00
0.00
42
100
0
100.00
0.00
0.00
43
100
0
100.00
0.00
0.00
44
100
0
100.00
0.00
0.00
45
100
0
100.00
0.00
0.00
46
100
0
100.00
0.00
0.00
47
100
0
100.00
0.00
0.00
48
100
0
100.00
0.00
0.00
49
100
0
100.00
0.00
0.00
50
100
0
100.00
0.00
0.00
51
100
0
100.00
0.00
0.00
52
100
0
100.00
0.00
0.00
53
100
0
100.00
0.00
0.00
54
100
0
100.00
0.00
0.00
55
100
0
100.00
0.00
0.00
56
100
0
100.00
0.00
0.00
57
100
0
100.00
0.00
0.00
58
100
0
100.00
0.00
0.00
59
100
0
100.00
0.00
0.00
60
100
0
100.00
0.00
0.00
61
99.99
0.01
100.00
0.00
0.04
62
100
0
100.00
0.00
0.00
63
99.99
0.01
100.00
0.00
0.01
64
100
0
100.00
0.00
0.00
65
100
0
100.00
0.00
0.00
66
100
0
100.00
0.00
0.00
67
100
0
100.00
0.00
0.00
68
100
0
100.00
0.00
0.00
69
100
0
100.00
0.00
0.00
70
100
0
100.00
0.00
0.00
71
100
0
100.00
0.00
0.00
72
100
0
100.00
0.00
0.00
73
100
0
100.00
0.00
0.00
74
100
0
100.00
0.00
0.00
75
100
0
100.00
0.00
0.00
76
100
0
100.00
0.00
0.00
77
100
0
100.00
0.00
0.00
78
100
0
100.00
0.00
0.01
79
100
0
100.00
0.00
0.00
80
100
0
100.00
0.00
0.00
81
100
0
100.00
0.00
0.01
82
100
0
100.00
0.00
0.00
83
100
0
100.00
0.00
0.00
84
100
0
100.00
0.00
0.00
85
100
0
100.00
0.00
0.00
86
100
0
100.00
0.00
0.00
87
100
0
100.00
0.00
0.00
88
100
0
100.00
0.00
0.00
89
100
0
100.00
0.00
0.00
90
100
0
100.00
0.00
0.00
91
100
0
100.00
0.00
0.00
92
100
0
100.00
0.00
0.00

Interface response times in milliseconds

Day
Payment Initiation (Dedicated)
Account information (Dedicated)
Funds check (Dedicated)
Payment Initiation (Mobile)
Account information (Mobile)
1
186
51
39
170
28
2
159
40
34
146
12
3
159
39
35
141
11
4
196
51
37
163
18
5
178
45
37
162
14
6
179
48
36
162
14
7
175
42
36
157
15
8
183
49
36
161
17
9
171
40
33
154
12
10
160
40
34
146
12
11
182
49
36
161
16
12
236
50
38
201
18
13
175
47
35
158
14
14
184
47
35
164
16
15
186
48
36
162
13
16
168
39
35
153
12
17
167
39
34
148
12
18
186
51
37
170
19
19
171
45
34
156
16
20
170
48
34
154
16
21
173
45
34
153
13
22
191
48
35
156
17
23
173
39
34
150
12
24
171
39
33
146
12
25
181
48
36
160
14
26
183
42
35
158
16
27
175
47
35
155
17
28
186
50
38
155
22
29
194
50
37
160
23
30
170
39
35
144
12
31
167
39
34
139
12
32
233
62
50
251
62
33
190
46
36
172
21
34
209
46
36
180
15
35
192
47
36
153
18
36
190
51
39
155
20
37
169
43
39
143
14
38
171
46
38
141
14
39
186
55
40
163
30
40
171
50
44
150
21
41
177
51
39
147
19
42
175
50
38
147
20
43
183
52
39
152
20
44
171
43
38
144
15
45
167
43
39
140
15
46
182
52
41
153
17
47
169
41
39
148
19
48
169
41
40
149
20
49
173
41
40
149
23
50
187
42
41
155
32
51
165
37
37
139
14
52
155
37
38
136
14
53
176
41
38
146
22
54
168
38
37
142
20
55
172
41
38
149
30
56
184
47
39
156
35
57
195
46
39
166
52
58
161
29
29
130
17
59
173
29
29
139
17
60
217
37
31
196
32
61
182
40
34
166
41
62
179
39
36
170
32
63
176
53
40
166
106
64
192
39
38
173
39
65
172
34
36
163
20
66
168
34
34
160
18
67
173
37
35
166
33
68
172
35
35
163
27
69
174
36
36
163
19
70
172
42
38
161
20
71
168
51
35
162
26
72
159
50
34