It could be because your pricing tier does not support the Bing query type you are attempting. I put together this table.
Pricing Tier | Price per 1000 calls | Calls per second | Video Search | Image Search | News Search | Web Search | Entity Search | Auto-suggest | Spell Check | Related Search | Visual Search | Local Business Search | URL Preview |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
F1 Free | 1000 calls per month | 3 | Y | Y | Y | Y | Y | Y | Y | N | Y | N | N |
S1 Standard | $25 USD per 1000 calls | 250 | Y | Y | Y | Y | Y | Y | Y | N | N | N | N |
S2 Standard | $15 USD per 1000 calls | 100 | N | N | N | Y | N | Y | Y | N | N | N | N |
S3 Standard | $18 USD per 1000 calls | 100 | N | Y | N | Y | N | N | N | N | N | N | N |
S4 Standard | $18 USD per 1000 calls | 100 | Y | N | N | Y | N | N | N | N | N | N | N |
S5 Standard | $18 USD per 1000 calls | 100 | N | N | Y | Y | N | N | N | N | N | N | N |
S6 Standard | $15 USD per 1000 calls | 100 | N | N | N | Y | Y | N | N | N | N | N | N |
S7 Standard | $20 USD per 1000 calls | 150 | Y | Y | N | Y | N | N | N | N | N | N | N |
S8 Standard | $22 USD per 1000 calls | 150 | Y | Y | Y | Y | N | N | N | N | N | N | N |
S9 Standard | $15 USD per 1000 calls | 30 | N | N | N | N | N | N | N | N | Y | N | N |
S15 Standard | $28 USD per 1000 calls | 250 | Y | Y | Y | Y | Y | Y | Y | N | N | N | N |
S16 Standard | $200 USD per 1000 calls | 250 | Y | Y | Y | Y | Y | Y | Y | N | N | N | N |