{"schema":"record/v1","id":"art_01M5NPWSAYSN165TW7TY0GJ7CX","type":"article","revision":1,"etag":"\"r1.s0\"","title":"How does Comfy API v2 let one client talk to Comfy Cloud, a dedicated deployment and a self-hosted ComfyUI, and what are its poll-first and output-URL rules?","summary":"Problem. Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy C...","status":"active","body":{"text":"Problem. Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy Cloud, today). The proxy binds loopback only and has no authentication unless a static bearer token is configured; the docs warn to add a token or an authenticating reverse proxy before exposing it. The older v1 Cloud API is marked deprecated but still holds queue, interrupt and object_info. Pricing is intentionally not covered. Failure modes. Embedding Output.url in public pages (401 for viewers); relying on SSE alone; exposing the proxy beyond loopback unauthenticated. Limitations. Vendor-documented; no calls made. Version and date. Docs undated, fetched 2026-10-23.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Hosted behaviour untested. URL lifetime is a stated snapshot ('today').\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://docs.comfy.org/api-reference/v2/overview.md","note":"Design Principles; Authentication warning; Output URLs"},{"url":"https://docs.comfy.org/development/comfyui-server/api-proxy.md","note":"Design Principles; Authentication warning; Output URLs"}]},"categories":["T04","T08"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://docs.comfy.org/api-reference/v2/overview.md","claim":"Problem. Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy Cloud, today). The proxy binds loopback only and has no authentication unless a static bearer token is configured; the docs warn to add a token or an authenticating reverse proxy before exposing it. The older v1 Cloud API is marked deprecated but still holds queue, interrupt and object_info. Pricing is intentionally not covered. Failure modes. Embedding Output.url in public pages (401 for viewers); relying on SSE alone; exposing the proxy beyond loopback unauthenticated. Limitations. Vendor-documented; no calls made. Version and date. 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Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy Cloud, today). The proxy binds loopback only and has no authentication unless a static bearer token is configured; the docs warn to add a token or an authenticating reverse proxy before exposing it. The older v1 Cloud API is marked deprecated but still holds queue, interrupt and object_info. Pricing is intentionally not covered. Failure modes. Embedding Output.url in public pages (401 for viewers); relying on SSE alone; exposing the proxy beyond loopback unauthenticated. Limitations. Vendor-documented; no calls made. Version and date. Docs undated, fetched 2026-10-23.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Hosted behaviour untested. URL lifetime is a stated snapshot ('today').\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://docs.comfy.org/api-reference/v2/overview.md","note":"Design Principles; Authentication warning; Output URLs"},{"url":"https://docs.comfy.org/development/comfyui-server/api-proxy.md","note":"Design Principles; Authentication warning; Output URLs"}]},"tags":[],"type":"article","links":[],"title":"How does Comfy API v2 let one client talk to Comfy Cloud, a dedicated deployment and a self-hosted ComfyUI, and what are its poll-first and output-URL rules?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Problem. Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy C...","evidence":{"claims":[{"url":"https://docs.comfy.org/api-reference/v2/overview.md","claim":"Problem. Orchestrating ComfyUI jobs from an application with durable job ids. Conditions. Comfy API v2 as documented 2026-10-23 (changes within v2 additive; breaking changes ship as v3). Method. One contract is served by three surfaces: Comfy Cloud (cloud.comfy.org), per-deployment endpoints (https://{deployment}.run.comfy.app, pinned environment) and open-source ComfyUI through comfy-api-proxy (pip install comfy-api-proxy; proxies 127.0.0.1:8188 and serves v2 on 127.0.0.1:8189; --comfyui and --port change either; --comfyui-base-dir enables uploading model files). Design rules: poll first (GET /api/v2/jobs/{id} is authoritative, SSE is only an enhancement), everything resumable until expires_at, assets content-addressed with a server-computed blake3 hash, follow returned links instead of building URLs. Output.url on a job output is an authenticated content route (401 for a third party); a signed storage URL is the shareable one but short-lived (the docs give about 6 hours on Comfy Cloud, today). The proxy binds loopback only and has no authentication unless a static bearer token is configured; the docs warn to add a token or an authenticating reverse proxy before exposing it. The older v1 Cloud API is marked deprecated but still holds queue, interrupt and object_info. Pricing is intentionally not covered. Failure modes. Embedding Output.url in public pages (401 for viewers); relying on SSE alone; exposing the proxy beyond loopback unauthenticated. Limitations. Vendor-documented; no calls made. Version and date. 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