stellar.mivisor.com
Open-source · MIT · Stellar testnet

Public-works evidence,
anchored on Stellar and verifiable.

An SDK that signs every output with SHA-256, pins it to IPFS, and anchors it in a native Stellar transaction. Any citizen can recompute the hash and verify integrity without trusting the operator.

$ pip install monitor-as-a-service $ npm install monitor-as-a-service
▶ Try in Colab See live demo → Source code ↗
Validator account (testnet): GDRWQERI…3JCPFR · npm PyPI Schema CC0

How it works

Four simple steps. No custodians, no central server, no trust required. Any third party can reproduce the verification with open-source code.

1

Canonical hash

The SDK computes SHA-256 of the canonicalized JSON and the raw image, on the producer side.

2

IPFS pin

JSON and image are pinned to IPFS. The resulting CID is the hash itself (content-addressable).

3

Stellar manageData

A native transaction with 8 manageData ops anchors hashes and CIDs. Memo: dIAra ancla v3.

4

Open verification

Anyone reads the TX, fetches from any IPFS gateway, and recomputes the SHA-256. They match — or the anchor is broken.

Live demo

Interactive dashboard connected to Stellar testnet. Reads 100+ anchored outputs, verifies cryptographic integrity against IPFS, and renders worksite stats (stages, machinery, people over time).

  • Live SHA-256 verification, client-side
  • IPFS gateway fallback with timeout
  • Gallery of anchored photographs
  • Date-range selector
Open dashboard ↗   Live verify ↗
[OK] Connected to horizon-testnet.stellar.org
[OK] Account GDRW…3JCPFR
     anchored outputs: 147
     range: 2025-10-03 → 2026-04-22

[VERIFY] output 20251029-143000
     img CID: bafkrei…q4y
     img SHA-256: match ✓
     json SHA-256: match ✓
     integrity: verified

Open on-chain data

Every anchored output is public on Stellar testnet. Any developer, auditor, or journalist can query the account without prior authorization.

AI validator account

GDRWQERI6PI3WICTGPJBFBEFRV7ZRLCWG3IRA2YZQA5ZINHPY23JCPFR

Each output produces a transaction with 8 manageData operations. Memo: dIAra ancla v3.

View on stellar.expert ↗
100+
Anchored outputs
8 ops
Per TX (multi-op)
~800 stroops
Cost per output

Resources

Schema, SDKs, demos, and technical specifications. All under MIT (code) or CC0 (schema).

Repo

GitHub · stellar_repo

Full code, contracts, Phase 1 and Phase 2 specs, phased roadmap.
Schema · CC0

Open Anchor Schema v1

Public on-chain contract. Anyone can build on top of the data, no permission needed.
Notebook

Colab demo (Python)

Connects to testnet, lists 100+ outputs, verifies integrity, and generates a dashboard. Zero install.
Python · PyPI

monitor-as-a-service

pip install monitor-as-a-service. Reference SDK with ipywidgets.
JavaScript · npm

monitor-as-a-service

npm install or import directly from the jsDelivr CDN, no build required.
Spec

Phase 1 — Testnet anchoring

Technical spec of the anchor-service: ingestion, IPFS pinning, Stellar multi-op.
Spec

Phase 2 — Soroban + alerts

Advisory smart contracts on SICOP/Treasury payments. Prerequisite: Phase 1 on mainnet.
Roadmap

Phased model

Phase 0 (monitoring) → Phase 1 (anchoring) → Phase 2 (transparency twin) → Phase 3 (tokenized bond).
Real-world case

obrapublica.info / stellar

Citizen viewer with real data: dashboard, map, timelapse, and dev hub.

Authors

The people behind this repository.

Alejandro Herrera
Juan Alejandro Herrera López
Co-author
LinkedIn
Andrés Herrera Monge
Andrés Herrera Monge
Founder Mivisor · Co-author
LinkedIn

Context

This SDK accompanies three active technical-outreach initiatives in 2026:

Shared goal: showing that verifiable public-works transparency in Costa Rica and LATAM can be built today on open infrastructure — Stellar, IPFS, CC0 schemas, and MIT SDKs — without depending on custodians, private platforms, or restrictive licenses.

TicoBlockchain 2026 CIGEPRO 2026 Hackathon Morpho Studio Open-source MIT Schema CC0

Academic material and reference paper available on request: alejandroherreracr@gmail.com