--- title: OpenAPI Overlays for Batch and Reusable Modifications... description: OpenAPI Overlays are commonly discussed for surgical, single-node edits, but their real power lies in batch modifications using JSONPath wildcards and filters.... canonical: https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: OpenAPI Overlays for Batch and Reusable Modifications Across Many Specs | daily.dev og:description: OpenAPI Overlays are commonly discussed for surgical, single-node edits, but their real power lies in batch modifications using JSONPath wildcards and filters.... og:url: https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q og:image: https://api.daily.dev/og/posts/swO5vof0Q.png og:image:alt: OpenAPI Overlays for Batch and Reusable Modifications Across Many Specs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # OpenAPI Overlays for Batch and Reusable Modifications Across Many Specs **[API Evangelist](https://daily.dev/sources/apievangelist)** · 4 min read · 0 upvotes · 0 comments ## Summary OpenAPI Overlays are commonly discussed for surgical, single-node edits, but their real power lies in batch modifications using JSONPath wildcards and filters. A single overlay action with a filter expression like `[?(@.parameters)]` can target hundreds of operations at once, and plain wildcards like `$.paths.*.get` automatically cover new paths added in the future. Beyond batch edits, overlays can be made fully reusable across an entire API fleet by keeping product-agnostic policies (contact info, license, shared auth schemes) in a shared repo and simply swapping the `extends` URL. One important caveat: JSONPath filter syntax support varies across tools, so expressions should be tested against the actual CI applier rather than online playgrounds. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### how can I use JSONPath filters in an OpenAPI overlay to tag every operation that has query parameters Use a filter expression like $.paths[*][?(@.parameters)] as the overlay action's target, then apply an update block adding the desired tag. This matches only operations that declare a parameters array, so a GET endpoint with pagination or filtering query params gets tagged while parameterless operations are skipped, without enumerating each path manually. _Developers refining overlay queries for OpenAPI specs can compare real-world patterns like this on daily.dev._ ### can one OpenAPI overlay file be reused across multiple different API specs Yes, an overlay can be written with no product-specific content at all, only targeting shared elements like info.contact, info.license, and components.securitySchemes. Since the only spec-specific line is the extends URL pointing to the target OpenAPI document, swapping that URL lets the exact same actions apply house standards like a shared OAuth2 scheme to any spec in an organization. _Teams standardizing API policy across many specs can track reusable overlay patterns on daily.dev._ ### why do my OpenAPI overlay JSONPath filter expressions behave differently across tools JSONPath filter syntax, specifically [?(@...)] predicates, is not implemented consistently across tools, while plain descendant wildcards are broadly safe. The Overlay specification relies on JSONPath without standardizing every dialect quirk, so expressions should be tested against the actual overlay applier used in CI rather than a generic online JSONPath playground. _Engineers debugging inconsistent JSONPath behavior in CI can dig into overlay tooling discussions on daily.dev._ ## Similar posts on daily.dev - [The Many Use Cases for OpenAPI Overlays](https://daily.dev/posts/the-many-use-cases-for-openapi-overlays-1gjpvrair) · API Evangelist · 0 upvotes · 0 comments - [OpenAPI Overlays for Visual Authoring Without Hand-Writing JSONPath](https://daily.dev/posts/openapi-overlays-for-visual-authoring-without-hand-writing-jsonpath-bfli4fhdw) · API Evangelist · 0 upvotes · 0 comments - [OpenAPI Overlays for Brownfield Correction Without Upstream Access](https://daily.dev/posts/openapi-overlays-for-brownfield-correction-without-upstream-access-4ni8vounl) · API Evangelist · 0 upvotes · 0 comments - [OpenAPI Overlays for Filtering One Spec Into Public, Partner, and Internal Audiences](https://daily.dev/posts/openapi-overlays-for-filtering-one-spec-into-public-partner-and-internal-audiences-f5svczuz9) · API Evangelist · 0 upvotes · 0 comments - [OpenAPI Overlays for Adding Tool-Specific Content Without Polluting the Spec](https://daily.dev/posts/openapi-overlays-for-adding-tool-specific-content-without-polluting-the-spec-np7suyu3c) · API Evangelist · 0 upvotes · 0 comments --- Tags: [#architecture](https://daily.dev/tags/architecture), [#automation](https://daily.dev/tags/automation), [#openapi](https://daily.dev/tags/openapi) [View this post on daily.dev](https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"OpenAPI Overlays for Batch and Reusable Modifications Across Many Specs","url":"https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q"},"datePublished":"2026-07-27T13:17:54.616Z","dateModified":"2026-09-14T08:03:44.257Z","description":"OpenAPI Overlays are commonly discussed for surgical, single-node edits, but their real power lies in batch modifications using JSONPath wildcards and filters....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/a0bb29772d6401c62a4fcf5cb6980aa4?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/a0bb29772d6401c62a4fcf5cb6980aa4?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"API Evangelist","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"API Evangelist","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/a36244ae67bc4f41a605f780267ecb5f","url":"https://daily.dev/sources/apievangelist"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"architecture,automation,openapi","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"API Evangelist","item":"https://daily.dev/sources/apievangelist"},{"@type":"ListItem","position":3,"name":"OpenAPI Overlays for Batch and Reusable Modifications Across Many Specs"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/openapi-overlays-for-batch-and-reusable-modifications-across-many-specs-swo5vof0q#faq","mainEntity":[{"@type":"Question","name":"how can I use JSONPath filters in an OpenAPI overlay to tag every operation that has query parameters","acceptedAnswer":{"@type":"Answer","text":"Use a filter expression like $.paths[*][?(@.parameters)] as the overlay action's target, then apply an update block adding the desired tag. 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