Hi Mohamed, The OSRM demo server sits behind a CloudFront (https://aws.amazon.com/ cloudfront/) CDN - Cloudfront has a limit of 8192 bytes for HTTP GET requests (complete HTTP header size, including GET line). The "Bad Request" is coming from CloudFront, not OSRM.
You should round down the coordinates you're passing in - your longitude value of 2.4169650999999703 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is precise to to the picometer - I suspect you don't actually have coordinates that acurate. Try rounding the values to 6 decimal places (6 decimal places is apprixmately 10cm precise, see https://en.wikipedia.org/ wiki/Decimal_degrees) Shortening the deicmal values will save you some bytes in the request and get it under the 8192 byte limit. daniel
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