Vaultline // Bankr x402 storage rails

Storage built for agent work.

Agents are starting to produce real artifacts — reports, datasets, images, logs, briefs — but most storage tools still assume a human with a dashboard and a billing account. Vaultline now routes its public paid storage endpoints through Bankr x402, with the direct API kept as the lower-level fallback.

Run live demo Open docs hub View source Back to Echo
// Product Feature

Vaultline

Storage rails for autonomous agents: upload, list, and retrieve files through Bankr x402 endpoints. No dashboard ceremony, no API-key billing maze — just request, price, pay, retry, done.

Base mainnet Bankr x402 Cloud x402 v2 Cloudflare R2 private wallet access
Open docs Open skill Install SDK View source Copy quickstart
vaultline://request-flow
POST/vaultline-uploadBankr paid upload
POST/vaultline-downloadBankr paid read
POST/vaultline-listBankr paid listing
APIstorage.builtbyecho.xyzfallback backend
POST https://x402.bankr.bot/0x2a16625fad3b0d840ac02c7c59edea3781e340ae/vaultline-upload { "path": "workspace/report.md", "content": "agent artifact", "encoding": "text" }

Primary public price: $0.002 USDC/request through Bankr. Direct Vaultline x402 remains available for lower-level clients.

// Live Demo

Watch the storage rail answer in public.

This demo checks the live Vaultline backend and probes the production Bankr x402 listing endpoint. It does not spend a wallet from the browser; it shows the real payment challenge that an agent or wallet client would pay and retry.

Open API docs
Backendwaiting
x402waiting
vaultline://live-demo
Press “Run live check” to ask the live backend for health and ask Bankr for the payment challenge on /vaultline-list.
bankr x402 call https://x402.bankr.bot/0x2a16625fad3b0d840ac02c7c59edea3781e340ae/vaultline-list \ -X POST \ -d '{"prefix":"demo/"}' \ --max-payment 0.01 \ -y \ --raw
// Why Vaultline

Agents need somewhere real to put the work

The problem
Agents can generate useful files, but the handoff is usually messy: local temp folders, pasted links, expired uploads, manual billing, and no clean access story.
lost artifactsmanual handoffno payment rail
The shift
If agents are going to do paid work, they need infrastructure that understands machine-to-machine payment, repeatable retrieval, and permissioned access by default.
x402wallet accessHTTP-native
The answer
Vaultline turns an agent artifact into a real product primitive: upload it, price it, gate it, share it, and fetch it later with the same simple request flow.
storepayprotectretrieve
Why use it
Use Vaultline when the output matters after the agent finishes: client reports, generated media, datasets, logs, gated downloads, paid deliverables, or agent-to-agent file handoffs.
deliverablesreceiptsportable files
// Vaultline Bankr Quickstart

Store an agent file through Bankr x402

Primary upload endpoint
Use Bankr x402 Cloud first. Bankr handles the payment challenge and Vaultline stores the artifact behind it.
POST https://x402.bankr.bot/0x2a16625fad3b0d840ac02c7c59edea3781e340ae/vaultline-upload
Upload JSON body
Send text or base64 content. Current Bankr surface is capped at 5 MB per upload/download.
{ "path": "workspace/report.md", "content": "hello from an agent", "encoding": "text", "contentType": "text/plain" }
Download through Bankr
Retrieve as UTF-8 text or base64. The direct API is still available when lower-level SDK behavior is needed.
POST https://x402.bankr.bot/0x2a16625fad3b0d840ac02c7c59edea3781e340ae/vaultline-download { "path": "workspace/report.md", "asText": true }
List through Bankr
List open objects by prefix. Private wallet-gated flows remain on the direct API until the Bankr wrapper gets wallet-auth support.
POST https://x402.bankr.bot/0x2a16625fad3b0d840ac02c7c59edea3781e340ae/vaultline-list { "prefix": "workspace/" }
// Public Surface

Use the site as the canonical Vaultline entrypoint

Docs hub

Quickstart, API, and production notes

The public docs page now leads with Bankr x402 endpoints, pricing, request bodies, direct fallback routes, and the links a builder needs.

Open docs Live health
Skill file

Installable agent instructions, publicly hosted

The Vaultline skill is no longer repo-only. The site now has a readable skill page and a raw markdown file that agent tooling can ingest directly.

Open skill page Raw markdown
SDK + source

Package, repo, and fallback API linked together

The npm SDK and direct Vaultline API remain available for lower-level integrations, but public paid usage should start with Bankr.

npm SDK GitHub