Meta Tech ProviderWhatsApp error codes
WhatsApp error 100: Invalid parameter
WhatsApp or your platform. What it means, how to fix it, and whether to retry.
What it means
WhatsApp error 100 (#100) means part of the request was in a form WhatsApp doesn't accept — an unsupported field, a value that's too long, or a link that isn't a valid URL. It's usually for the platform to fix rather than you.
WhatsApp's title for it
“Invalid parameter” (100)
Whose problem it is
WhatsApp or your platform
Why it happens
- A field WhatsApp doesn't support, or a misspelled one.
- A value that's too long.
- A link that isn't a valid URL — for example a header image given as a file path instead of a web address.
How to fix error 100
- Report it to your platform with the full error message — the text after #100 says which field.
Should you retry?
Not until the request is corrected.
How to prevent it
- Nothing on your side — it's how the request is built.
Common questions
What does "image.link is not a valid URI" mean?
The message gave WhatsApp something that isn't a web address for the header image. It's a platform-side problem; report it.
How ThinnestAI shows it
On ThinnestAI every message WhatsApp doesn't deliver shows WhatsApp's own message first — word for word, with its code — and what it means underneath, on the broadcast and in the inbox. Undelivered messages aren't charged. See the WhatsApp Business API.