--- layout: default ---

X-Amz-Algorithm

de facto — unregistered request

Declared by 96 providers across 3023 published specification files in the APIs.io network.

What this header is for, and how to use it →

A count here is providers whose published contract declares this header — not providers who send it. Response headers set at the edge rarely appear in an OpenAPI at all, so a low number can measure documentation practice rather than deployment.

Providers declaring it (96)

amazon-app-mesh amazon-app-runner amazon-codeartifact amazon-codebuild amazon-codedeploy amazon-codeguru-profiler amazon-codeguru-reviewer amazon-codeguru-security amazon-codepipeline amazon-codestar amazon-cognito amazon-comprehend amazon-compute-optimizer amazon-config amazon-device-farm amazon-devops-guru amazon-direct-connect amazon-directory-service amazon-dms amazon-ec2-auto-scaling amazon-ec2-image-builder amazon-elastic-transcoder amazon-entity-resolution amazon-eventbridge-pipes amazon-eventbridge-scheduler amazon-gamelift amazon-global-accelerator amazon-glue amazon-glue-databrew amazon-ground-station amazon-guardduty amazon-health-dashboard amazon-healthimaging amazon-healthlake amazon-healthomics amazon-iam-access-analyzer amazon-iam-identity-center amazon-incident-manager amazon-inspector amazon-interactive-video-service amazon-iot-core amazon-iot-device-defender amazon-iot-device-management amazon-iot-events amazon-iot-fleetwise amazon-iot-greengrass amazon-iot-sitewise amazon-iot-twinmaker amazon-lookout-for-metrics amazon-lookout-for-vision amazon-macie amazon-mainframe-modernization amazon-managed-apache-flink amazon-managed-blockchain amazon-managed-grafana amazon-managed-prometheus amazon-marketplace amazon-mechanical-turk amazon-mediaconnect amazon-mediaconvert amazon-medialive amazon-mediapackage amazon-mediastore amazon-mediatailor amazon-migration-hub amazon-mq amazon-msk amazon-network-firewall amazon-opensearch amazon-outposts amazon-panorama amazon-payment-cryptography amazon-pinpoint amazon-polly amazon-private-ca amazon-proton amazon-qldb amazon-robomaker amazon-route53-resolver amazon-ses amazon-signer amazon-simspace-weaver amazon-snow-family amazon-step-functions amazon-storage-gateway amazon-swf amazon-well-architected-tool amazon-workmail amazon-workspaces amazon-workspaces-web amazon-xray aws-app-mesh aws-redshift aws-step-functions engineering-platform kinesis

Explore

All headers Authentication Guidance on headers.apievangelist.com

Work with this as data

Every header here is available over the APIs.io API and to AI agents over MCP. HTTP Headers is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for http headers

3 MCP tools reach this

apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

Search the catalog

curl "https://apis.io/api/v1/search?q=x-amz-algorithm&limit=10"

Everything under a tag

curl "https://apis.io/api/v1/tags/x-amz-algorithm"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.