{"catalogRevision":"cat_f13ab9a494120b5e","recipeId":"page:guides:echo:object-client","recipeRevision":"r1","canonicalPath":"/guides/echo/object-client","label":"Configure S3-compatible access for Echo","family":"Framework operation","summary":"Object storage client for a Echo app on Ample. Verified on Echo: bucket credentials delivered as encrypted S3_* environment variables and a validated PutObject/GetObject round-trip linked to a database row (upload=ok linked=ok). Build and start: CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build).","representativeQueries":["Configure S3-compatible access for Echo","Where can I host Configure S3-compatible access built with Echo?","I need exact S3 endpoint, credentials, operation requirements and an upload/download verification."],"breadcrumbIds":["discovery","stack","stack:frameworks","stack:framework-echo","page:guides:echo:object-client"],"breadcrumbs":[{"id":"discovery","label":"Agent hosting discovery","canonicalPath":"/discover/discovery","kind":"root"},{"id":"stack","label":"Frameworks and execution targets","canonicalPath":"/discover/stack","kind":"facet"},{"id":"stack:frameworks","label":"Frameworks","canonicalPath":"/discover/stack/frameworks","kind":"group"},{"id":"stack:framework-echo","label":"Echo","canonicalPath":"/discover/stack/framework-echo","kind":"atom"},{"id":"page:guides:echo:object-client","label":"Configure S3-compatible access for Echo","canonicalPath":"/guides/echo/object-client","kind":"recipe"}],"parentIds":["stack:framework-echo","intent:connect-app-to-storage","pattern:browser-file-uploads"],"parents":[{"id":"stack:framework-echo","label":"Echo","canonicalPath":"/discover/stack/framework-echo","kind":"atom"},{"id":"intent:connect-app-to-storage","label":"Connect app to storage","canonicalPath":"/discover/intent/connect-app-to-storage","kind":"atom"},{"id":"pattern:browser-file-uploads","label":"Browser file uploads","canonicalPath":"/discover/pattern/browser-file-uploads","kind":"atom"}],"resourceRequirements":["primitive:compute","primitive:s3-compatible-object-storage"],"infrastructureRequirements":[{"primitiveId":"primitive:compute","label":"Compute","canonicalPath":"/discover/primitive/compute","status":"verified","summary":"Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes."},{"primitiveId":"primitive:s3-compatible-object-storage","label":"S3-compatible object storage","canonicalPath":"/discover/primitive/s3-compatible-object-storage","status":"verified","summary":"Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified."}],"framework":"Echo","workload":"Configure S3-compatible access","releaseStatus":"published","supportStatus":"verified","executionStatus":"ready","docsOnly":false,"prerequisites":["An Echo project (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build))","A bucket from `ample bucket create` with credentials passed as encrypted S3_* environment variables","An Ample account token with servers:write, buckets:read"],"testedConfiguration":{"template":"ubuntu-24.04","runtime":"go","size":"s-1vcpu-1gb","build":"CGO_ENABLED=0 go build -o app ./...","start":"./app"},"inputSchema":{"additionalProperties":false,"properties":{"env":{"description":"Encrypted environment variables","items":{"pattern":"^[A-Z][A-Z0-9_]*=.*$","type":"string"},"maxItems":50,"type":"array"},"name":{"description":"App name","maxLength":63,"minLength":1,"pattern":"^[a-z0-9-]+$","type":"string"},"path":{"description":"Project directory or ample.toml service","maxLength":512,"minLength":1,"type":"string"},"release_command":{"description":"Migration command run before activation","maxLength":512,"type":"string"}},"required":["env","name","path"],"type":"object"},"outputSchema":null,"workflowSteps":[{"title":"Build and start","body":"CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build); the server must bind 0.0.0.0 on PORT."},{"title":"Create the bucket and pass its credentials","body":"Create it once with `ample bucket create`, then pass endpoint, region, bucket and keys with --env; use path-style addressing.","command":"ample deploy . --name <app-name> --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=..."},{"title":"Verify","body":"Fetch the live URL and /p/browser-file-uploads on the example; on failure read the build and runtime logs.","command":"ample logs <deployment_id> --kind build"}],"examples":[{"title":"Echo pattern fixture","description":"Verified object storage client on Echo.","sourceRef":"tests/deploy-canaries/echo-patterns"}],"successChecks":[{"description":"app responds on its public URL","kind":"http_get","path":"/","expect":"ample canary echo patterns"},{"description":"browser-file-uploads check from the example","kind":"http_get","path":"/p/browser-file-uploads","expect":"see the pattern fixture checks"}],"limitations":["Verified on the ubuntu-24.04 template at s-1vcpu-1gb; other sizes and Echo major versions are not verified.","Region, compliance attestations and request-duration limits are unknown and not claimed.","PutObject and GetObject with path-style addressing are verified; other S3 operations are not."],"costEstimate":{"currency":"USD","monthlyAmount":5.0,"authoritative":true,"basis":"size prices from pricing.toml (loaded by the API) at build revision 752d2a7584688a5d233b2c53d38307d289b04d3e","components":[{"name":"app server","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":5.0}],"note":"Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included."},"evidenceSummary":[{"kind":"canary_run","summary":"Echo pattern fixture deployed on Ample (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build)); for this guide: bucket credentials delivered as encrypted S3_* environment variables and a validated PutObject/GetObject round-trip linked to a database row (upload=ok linked=ok).","observedAt":"2026-09-21T02:34:39Z","implementationRevision":"1d28ae0 (CLI 0.1.21)","expiresAt":"2027-03-20T02:34:39Z","scope":{"checks":["/p/browser-file-uploads"],"template":"ubuntu-24.04"}}],"lastVerifiedAt":"2026-09-21T02:34:39Z","mcpBinding":{"registryRef":"mcp:ample_deploy","toolName":"ample_deploy","schemaHash":"876465fce906da0c224d62961d3343064108ebe30af80cf1b87094974e948853","observedAt":"2026-09-22T00:31:22.774679+00:00","implementationRevision":"e6446ceea69b","requiredScopes":["servers:write","buckets:read"],"bindingState":"current"},"unknowns":["region availability is unknown until a verified region fact is recorded","compliance attestations are unknown; none are claimed"],"formats":{"html":"https://ample.computer/guides/echo/object-client","markdown":"https://ample.computer/guides/echo/object-client.md","json":"https://api.ample.computer/v1/catalog/recipes/page%3Aguides%3Aecho%3Aobject-client"},"nextActions":[{"actionId":"browse-catalog","label":"Browse the catalog index","operationId":"catalog_index","method":"GET","relativePath":"/v1/catalog","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"search-recipes","label":"Search published recipes by intent, stack and constraints","operationId":"search_recipes","method":"POST","relativePath":"/v1/catalog/search","origin":"api","parameters":{"body":{"limit":5,"query":"Configure S3-compatible access for Echo"}},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"plan:page:guides:echo:object-client","label":"Prepare a side-effect-free deployment plan for an authorized project","operationId":"plan_deployment","method":"POST","relativePath":"/v1/catalog/plan","origin":"api","parameters":{"body":{"inputs":{},"projectId":"<workspace or server id you own>","recipeId":"page:guides:echo:object-client","recipeRevision":"r1"}},"requiresAuthentication":true,"requiresApproval":false},{"actionId":"auth-setup","label":"Read the existing agent authentication setup","operationId":"existing_auth_setup","method":"GET","relativePath":"/mcp/setup","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:stack:framework-echo","label":"Browse Echo","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/stack%3Aframework-echo","origin":"api","parameters":{"nodeId":"stack:framework-echo"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:intent:connect-app-to-storage","label":"Browse Connect app to storage","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/intent%3Aconnect-app-to-storage","origin":"api","parameters":{"nodeId":"intent:connect-app-to-storage"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:pattern:browser-file-uploads","label":"Browse Browser file uploads","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/pattern%3Abrowser-file-uploads","origin":"api","parameters":{"nodeId":"pattern:browser-file-uploads"},"requiresAuthentication":false,"requiresApproval":false}]}