docs: declare the 429 daily-volume response on /sandbox/send

[ls-bolt]

Summary

/sandbox/send can refuse a request with DAILY_VOLUME_LIMIT_EXCEEDED when funding a quote would take the customer past the daily withdrawal limit, but its response list did not declare a 429. Generated clients therefore had no typed error for a status the endpoint really returns.

• Declare the 429 / Error429 response on /sandbox/send.
• Widen the /quotes 429 description: the daily limit is checked when a quote is created, not only when immediatelyExecute is set.

Edited in openapi/ (the source) and rebundled with make build, so the generated openapi.yaml and mintlify/openapi.yaml stay in sync.

No enum changes — Error429 already carries DAILY_VOLUME_LIMIT_EXCEEDED, and Error400 already carries TRANSACTION_SIZE_LIMIT_EXCEEDED. This only documents the responses on the endpoints that emit them, so /transfer-out, /quotes, /quotes/{quoteId}/execute, and /sandbox/send now all declare the 429.

Compatibility

Additive. A newly documented error response on an endpoint that already returns it — no request or success-response shape changes, and no existing field is removed or renamed.

Test plan

• npm run build:openapi re-run; git diff --exit-code openapi.yaml mintlify/openapi.yaml is clean, which is the check CI runs
• npx spectral lint openapi.yaml --fail-severity=error — passes (exit 0)
• npx @redocly/cli lint openapi/openapi.yaml — 7 errors, all pre-existing in the card-simulation paths; identical count on a clean main
• Verified all four endpoints that can emit the limit now declare 429 with the Error429 schema

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
grid-flow-builder	Ignored	Preview	Aug 25, 2026 11:57pm
grid-wallet-demo	Ignored	Preview	Aug 25, 2026 11:57pm

[lightspark-bot]

• docs: declare the 429 daily-volume response on /sandbox/send #866 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

✱ Stainless preview builds for grid

This PR will update the grid SDKs with the following commit messages.

cli

chore(internal): regenerate SDK with no functional changes

go

chore(internal): regenerate SDK with no functional changes

kotlin

chore(internal): regenerate SDK with no functional changes

openapi

feat(api): add 429 error response to quote funding method

php

chore(internal): regenerate SDK with no functional changes

python

chore(internal): regenerate SDK with no functional changes

ruby

chore(internal): regenerate SDK with no functional changes

typescript

chore(internal): regenerate SDK with no functional changes

Edit this comment to update them. They will appear in their respective SDK's changelogs.

✅ grid-typescript studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ⏭️ (prev: build ✅) → lint ⏭️ (prev: lint ❗) → test ✅

✅ grid-openapi studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️

✅ grid-ruby studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ⏭️ (prev: build ✅) → lint ✅ → test ✅

✅ grid-go studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ⏭️ (prev: build ✅) → lint ❗ → test ❗

go get github.com/stainless-sdks/grid-go@91ab1d69fbe33549f6f11a7a693caab048394470

✅ grid-kotlin studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ⏭️ (prev: build ✅) → lint ⏭️ (prev: lint ✅) → test ❗

✅ grid-python studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ⏭️ (prev: build ✅) → lint ⏭️ (prev: lint ❗) → test ❗

✅ grid-php studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → lint ✅ → test ✅

✅ grid-cli studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ❗ → lint ❗ → test ❗

---

This comment is auto-generated by GitHub Actions and is automatically kept up to date as you push.
If you push custom code to the preview branch, re-run this workflow to update the comment.
Last updated: 2026-08-26 00:05:20 UTC

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
Grid	🟢 Ready	View Preview	Aug 26, 2026, 12:02 AM