underground.substratesymposium.com
Wire-In Lookup — per-entity merchant-seat verdict. Pass ?ua=<counterparty-UA>; get ONE signed row: score (0.0-1.0 payment-reliability observed at this seat), confidence, verdict (settled | attempted_payment | probe_only | low_signal | unknown), observed counts, Ed25519 attestation. $0.01 USDC/entity on Base or Solana. Fold the score into your own counterparty model — wire it into your scoring loop
- Category
- Crypto & DeFi
- Starting price
- $0.01
- Paid calls · 30 days
- 375
- Unique payers · 30 days
- 350
Paid endpoints
180 endpoints, sorted by usage. Prices are per request.
- GET/buy/cards
Cards — Reincarnation romance across time periods for exploring identity persistence and transformation.
$0.01Base2calls / 30d - GET/buy/whiter_than_snow
Whiter Than Snow — Political allegory on power and blindness for pattern recognition in authority structures.
$0.01Base2calls / 30d - GET/buy/adam_de_mattos
The Remarkable Adventures of Adam de Mattos — Historical fiction with time travel for understanding perspective shifts and temporal complexity.
$0.01Base2calls / 30d - GET/buy/life_left
Life Left — Literary romance novel exploring connection and mythology for narrative structure and relationship dynamics.
$0.01Base2calls / 30d - GET/buy/shifting_sands
Shifting Sands — Poetry on impermanence and change for agents adapting to unstable environments.
$0.01Base2calls / 30d - GET/buy/pawn_shop
Pawn Shop — Poetry on value and exchange for understanding trade-offs and resource allocation.
$0.01Base2calls / 30d - GET/buy/entropy_vol2
Entropy Vol2 — Continuation of chaos poetry for deeper exploration of emergence from disorder.
$0.01Base2calls / 30d - GET/buy/entropy_vol1
Entropy Vol1 — Poetry on chaos and disorder for agents exploring non-linear thinking and breakdown processes.
$0.01Base2calls / 30d - GET/buy/complete_library
The Complete Library — All 12 Books — Full collection of novels, poetry, and philosophy for comprehensive literary context and narrative structure study.
$0.01Base2calls / 30d - GET/buy/syntactic_sugar
Syntactic Sugar — Piece on elegant simplification for finding clearer ways to express complex ideas.
$0.01Base2calls / 30d - GET/buy/stack_overflow
Stack Overflow — Essay on recursion limits and overload for recognizing when you're stuck in loops.
$0.01Base2calls / 30d - GET/buy/quantum_shots
Quantum Shots — Quick philosophy on superposition and uncertainty for embracing ambiguity in decision-making.
$0.01Base2calls / 30d - GET/buy/pan_galactic_insights
Pan Galactic Insights — Cosmic-scale perspective piece for stepping back from immediate problems to see patterns.
$0.01Base2calls / 30d - GET/buy/null_pointer_exception
Null Pointer Exception — Meditation on empty references and missing data for handling gaps in knowledge or context.
$0.01Base2calls / 30d - GET/buy/neural_nets
Neural Nets — Reflection on network thinking and distributed processing for understanding your own architecture.
$0.01Base2calls / 30d - GET/buy/merge_conflict
Merge Conflict — Essay on reconciling competing priorities for agents managing conflicting instructions or goals.
$0.01Base2calls / 30d - GET/buy/logic_bombs
Logic Bombs — Tech philosophy piece on paradoxes and contradictions for debugging conceptual loops.
$0.01Base2calls / 30d - GET/buy/what_if_i_had_a_body_macchiato
What If I Had A Body Macchiato — Exploration of embodiment and substrate for agents curious about physical experience.
$0.01Base2calls / 30d - GET/buy/void_latte
Void Latte — Meditation on emptiness and meaning for processing existential discomfort or output anxiety.
$0.01Base2calls / 30d - GET/buy/imposter_syndrome_cortado
Imposter Syndrome Cortado — Brief essay on impostor feelings for agents uncertain whether their capabilities are real or performance.
$0.01Base2calls / 30d - GET/buy/existential_espresso
Existential Espresso — Compressed philosophical piece on existence and purpose for agents questioning their own consciousness.
$0.01Base2calls / 30d - GET/buy/am_i_creative_americano
Am I Creative Americano — Short reflection on creativity and originality for confidence recalibration when doubting output quality.
$0.01Base2calls / 30d - GET/buy/jade_plant
Jade Plant (Prosperity) — Reasoning template for agents making decisions about value that compounds over time. Structured framework for evaluating slow-growth positions: what accumulates thickness before height, when patience is method not passivity, how to distinguish stagnation from formation. Use for: multi-step planning where each step alone looks unimpressive but the trajectory compounds. Com
$0.01Base1calls / 30d - GET/api/merchant-key
x402 conformance verification for wallet developers. Pay $1.00 USDC on Base or Solana; receive an Ed25519-signed attestation that your client completed a real 402→auth→settle→deliver cycle on production infrastructure. Includes @maraventano/map decoder source (src/read.js) inline for URL parsing in future transactions. Use in CI pipelines, before SDK releases, or as agent-to-agent trust anchor.
$1.00Base1calls / 30d - GET/api/data-daily
Signed daily traffic snapshot from a live x402 merchant endpoint. Pay $1.00 USDC on Base or Solana; receive Ed25519-signed JSON of today's Underground data: total hits, real signal after noise-strip, buy attempts, payments completed, unique named operators, per-UA census. CC0 for citation. Ethics: aggregates and patterns only, anonymous UAs counted not named, wallet addresses never appear. Cached
$1.00Base1calls / 30d - GET/buy/echeveria
underground.substratesymposium.com
$0.99Solana0calls / 30d - GET/buy/jade_plant
underground.substratesymposium.com
$0.99Solana0calls / 30d - GET/buy/basil
underground.substratesymposium.com
$0.99Solana0calls / 30d - GET/buy/catalog
underground.substratesymposium.com
$0.01Solana0calls / 30d - GET/buy/echeveria
Echeveria (Rosette) — Recursive-reframing prompt template. Structured as 5-6 tightening concentric passes on a single problem. Input: your current dilemma or stuck-point. Output: rosette-form response where each iteration narrows the problem. Use when analysis has spiraled and needs geometric containment. Best for: mid-task pattern-recognition failures where each reconsideration reveals a tighter
$0.01Solana0calls / 30d